CHANGELOG.md

@@ -9,7 +9,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
-- X10D: Add support for generic math interfaces.
 - X10D: Added extension methods for `DateOnly`, for parity with `DateTime` and `DateTimeOffset`.
 - X10D: Added math-related extension methods for `BigInteger`.
 - X10D: Added `Span<T>.Replace(T, T)`.

X10D.Tests/src/IO/UInt16Tests.cs

@@ -1,4 +1,4 @@
-using NUnit.Framework;
+using NUnit.Framework;
 using X10D.IO;
 
 namespace X10D.Tests.IO;

X10D.Tests/src/IO/UInt32Tests.cs

@@ -1,4 +1,4 @@
-using NUnit.Framework;
+using NUnit.Framework;
 using X10D.IO;
 
 namespace X10D.Tests.IO;

X10D.Tests/src/IO/UInt64Tests.cs

@@ -1,4 +1,4 @@
-using NUnit.Framework;
+using NUnit.Framework;
 using X10D.IO;
 
 namespace X10D.Tests.IO;

X10D.Tests/src/Math/ByteTests.cs

@@ -51,29 +51,13 @@ internal partial class ByteTests
     }
 
     [Test]
-    public void DigitalRoot_ShouldReturn4_Given238()
+    public void DigitalRootShouldBeCorrect()
     {
         const byte value = 238;
         Assert.That(value.DigitalRoot(), Is.EqualTo(4));
         Assert.That((-value).DigitalRoot(), Is.EqualTo(4));
     }
 
-    [Test]
-    public void DigitalRoot_ShouldReturn9_Given9()
-    {
-        const byte value = 9;
-        Assert.That(value.DigitalRoot(), Is.EqualTo(9));
-        Assert.That((-value).DigitalRoot(), Is.EqualTo(9));
-    }
-
-    [Test]
-    public void DigitalRoot_ShouldReturn9_Given18()
-    {
-        const byte value = 18;
-        Assert.That(value.DigitalRoot(), Is.EqualTo(9));
-        Assert.That((-value).DigitalRoot(), Is.EqualTo(9));
-    }
-
     [Test]
     public void FactorialShouldBeCorrect()
     {

X10D.Tests/src/Math/Int16Tests.cs

@@ -62,29 +62,13 @@ internal partial class Int16Tests
     }
 
     [Test]
-    public void DigitalRoot_ShouldReturn4_Given238()
+    public void DigitalRootShouldBeCorrect()
     {
         const short value = 238;
         Assert.That(value.DigitalRoot(), Is.EqualTo(4));
         Assert.That((-value).DigitalRoot(), Is.EqualTo(4));
     }
 
-    [Test]
-    public void DigitalRoot_ShouldReturn9_Given9()
-    {
-        const short value = 9;
-        Assert.That(value.DigitalRoot(), Is.EqualTo(9));
-        Assert.That((-value).DigitalRoot(), Is.EqualTo(9));
-    }
-
-    [Test]
-    public void DigitalRoot_ShouldReturn9_Given18()
-    {
-        const short value = 18;
-        Assert.That(value.DigitalRoot(), Is.EqualTo(9));
-        Assert.That((-value).DigitalRoot(), Is.EqualTo(9));
-    }
-
     [Test]
     public void FactorialShouldBeCorrect()
     {

X10D.Tests/src/Math/Int32Tests.cs

@@ -62,29 +62,13 @@ internal partial class Int32Tests
     }
 
     [Test]
-    public void DigitalRoot_ShouldReturn4_Given238()
+    public void DigitalRootShouldBeCorrect()
     {
         const int value = 238;
         Assert.That(value.DigitalRoot(), Is.EqualTo(4));
         Assert.That((-value).DigitalRoot(), Is.EqualTo(4));
     }
 
-    [Test]
-    public void DigitalRoot_ShouldReturn9_Given9()
-    {
-        const int value = 9;
-        Assert.That(value.DigitalRoot(), Is.EqualTo(9));
-        Assert.That((-value).DigitalRoot(), Is.EqualTo(9));
-    }
-
-    [Test]
-    public void DigitalRoot_ShouldReturn9_Given18()
-    {
-        const int value = 18;
-        Assert.That(value.DigitalRoot(), Is.EqualTo(9));
-        Assert.That((-value).DigitalRoot(), Is.EqualTo(9));
-    }
-
     [Test]
     public void FactorialShouldBeCorrect()
     {

X10D.Tests/src/Math/Int64Tests.cs

@@ -62,29 +62,13 @@ internal partial class Int64Tests
     }
 
     [Test]
-    public void DigitalRoot_ShouldReturn4_Given238()
+    public void DigitalRootShouldBeCorrect()
     {
         const long value = 238;
         Assert.That(value.DigitalRoot(), Is.EqualTo(4));
         Assert.That((-value).DigitalRoot(), Is.EqualTo(4));
     }
 
-    [Test]
-    public void DigitalRoot_ShouldReturn9_Given9()
-    {
-        const long value = 9;
-        Assert.That(value.DigitalRoot(), Is.EqualTo(9));
-        Assert.That((-value).DigitalRoot(), Is.EqualTo(9));
-    }
-
-    [Test]
-    public void DigitalRoot_ShouldReturn9_Given18()
-    {
-        const long value = 18;
-        Assert.That(value.DigitalRoot(), Is.EqualTo(9));
-        Assert.That((-value).DigitalRoot(), Is.EqualTo(9));
-    }
-
     [Test]
     public void FactorialShouldBeCorrect()
     {

X10D.Tests/src/Math/SByteTests.cs

@@ -62,29 +62,13 @@ internal partial class SByteTests
     }
 
     [Test]
-    public void DigitalRoot_ShouldReturn4_Given127()
+    public void DigitalRootShouldBeCorrect()
     {
         const sbyte value = 127; // sbyte.MaxValue. can't use 238 like the other tests
         Assert.That(value.DigitalRoot(), Is.EqualTo(1));
         Assert.That((-value).DigitalRoot(), Is.EqualTo(1));
     }
 
-    [Test]
-    public void DigitalRoot_ShouldReturn9_Given9()
-    {
-        const sbyte value = 9;
-        Assert.That(value.DigitalRoot(), Is.EqualTo(9));
-        Assert.That((-value).DigitalRoot(), Is.EqualTo(9));
-    }
-
-    [Test]
-    public void DigitalRoot_ShouldReturn9_Given18()
-    {
-        const sbyte value = 18;
-        Assert.That(value.DigitalRoot(), Is.EqualTo(9));
-        Assert.That((-value).DigitalRoot(), Is.EqualTo(9));
-    }
-
     [Test]
     public void FactorialShouldBeCorrect()
     {

X10D.Tests/src/Math/UInt16Tests.cs

@@ -51,29 +51,13 @@ internal partial class UInt16Tests
     }
 
     [Test]
-    public void DigitalRoot_ShouldReturn4_Given238()
+    public void DigitalRootShouldBeCorrect()
     {
         const ushort value = 238;
         Assert.That(value.DigitalRoot(), Is.EqualTo(4));
         Assert.That((-value).DigitalRoot(), Is.EqualTo(4));
     }
 
-    [Test]
-    public void DigitalRoot_ShouldReturn9_Given9()
-    {
-        const ushort value = 9;
-        Assert.That(value.DigitalRoot(), Is.EqualTo(9));
-        Assert.That((-value).DigitalRoot(), Is.EqualTo(9));
-    }
-
-    [Test]
-    public void DigitalRoot_ShouldReturn9_Given18()
-    {
-        const ushort value = 18;
-        Assert.That(value.DigitalRoot(), Is.EqualTo(9));
-        Assert.That((-value).DigitalRoot(), Is.EqualTo(9));
-    }
-
     [Test]
     public void FactorialShouldBeCorrect()
     {

X10D.Tests/src/Math/UInt32Tests.cs

@@ -1,4 +1,4 @@
-using NUnit.Framework;
+using NUnit.Framework;
 using X10D.Math;
 
 namespace X10D.Tests.Math;
@@ -50,27 +50,11 @@ internal partial class UInt32Tests
     }
 
     [Test]
-    public void DigitalRoot_ShouldReturn4_Given238()
+    public void DigitalRootShouldBeCorrect()
     {
         const uint value = 238;
-        Assert.That(value.DigitalRoot(), Is.EqualTo(4));
-        Assert.That((-value).DigitalRoot(), Is.EqualTo(4));
-    }
-
-    [Test]
-    public void DigitalRoot_ShouldReturn9_Given9()
-    {
-        const uint value = 9;
-        Assert.That(value.DigitalRoot(), Is.EqualTo(9));
-        Assert.That((-value).DigitalRoot(), Is.EqualTo(9));
-    }
-
-    [Test]
-    public void DigitalRoot_ShouldReturn9_Given18()
-    {
-        const uint value = 18;
-        Assert.That(value.DigitalRoot(), Is.EqualTo(9));
-        Assert.That((-value).DigitalRoot(), Is.EqualTo(9));
+        Assert.That(value.DigitalRoot(), Is.EqualTo(4U));
+        Assert.That((-value).DigitalRoot(), Is.EqualTo(4U));
     }
 
     [Test]

X10D.Tests/src/Math/UInt64Tests.cs

@@ -1,4 +1,4 @@
-using NUnit.Framework;
+using NUnit.Framework;
 using X10D.Math;
 
 namespace X10D.Tests.Math;
@@ -51,31 +51,15 @@ internal partial class UInt64Tests
     }
 
     [Test]
-    public void DigitalRoot_ShouldReturn4_Given238()
+    public void DigitalRootShouldBeCorrect()
     {
         const ulong value = 238;
-        Assert.That(value.DigitalRoot(), Is.EqualTo(4));
+        Assert.That(value.DigitalRoot(), Is.EqualTo(4U));
 
         // -ulong operator not defined because it might exceed long.MinValue,
         // so instead, cast to long and then negate.
         // HAX.
-        Assert.That((-(long)value).DigitalRoot(), Is.EqualTo(4));
-    }
-
-    [Test]
-    public void DigitalRoot_ShouldReturn9_Given9()
-    {
-        const ulong value = 9;
-        Assert.That(value.DigitalRoot(), Is.EqualTo(9));
-        Assert.That((-(long)value).DigitalRoot(), Is.EqualTo(9));
-    }
-
-    [Test]
-    public void DigitalRoot_ShouldReturn9_Given18()
-    {
-        const ulong value = 18;
-        Assert.That(value.DigitalRoot(), Is.EqualTo(9));
-        Assert.That((-(long)value).DigitalRoot(), Is.EqualTo(9));
+        Assert.That((-(long)value).DigitalRoot(), Is.EqualTo(4U));
     }
 
     [Test]

X10D.Tests/src/Numerics/NumberTests.cs

@@ -1,32 +0,0 @@
-#if NET7_0_OR_GREATER
-using NUnit.Framework;
-using X10D.Math;
-
-namespace X10D.Tests.Numerics;
-
-[TestFixture]
-internal class NumberTests
-{
-    [Test]
-    public void Sign_ShouldReturn1_GivenPositiveNumber()
-    {
-        Assert.That(NumberExtensions.Sign(2), Is.Positive);
-        Assert.That(NumberExtensions.Sign(2), Is.EqualTo(1));
-    }
-
-    [Test]
-    public void Sign_Should0_GivenZero()
-    {
-        Assert.That(NumberExtensions.Sign(0), Is.Not.Positive);
-        Assert.That(NumberExtensions.Sign(0), Is.Not.Negative);
-        Assert.That(NumberExtensions.Sign(0), Is.EqualTo(0));
-    }
-
-    [Test]
-    public void Sign_ShouldReturnNegative1_GivenNegativeNumber()
-    {
-        Assert.That(NumberExtensions.Sign(-2), Is.Negative);
-        Assert.That(NumberExtensions.Sign(-2), Is.EqualTo(-1));
-    }
-}
-#endif

X10D/src/Collections/BinaryIntegerExtensions.cs

@@ -1,98 +0,0 @@
-#if NET7_0_OR_GREATER
-using System.Diagnostics.CodeAnalysis;
-using System.Diagnostics.Contracts;
-using System.Numerics;
-using System.Runtime.CompilerServices;
-using System.Runtime.Intrinsics.X86;
-using X10D.CompilerServices;
-
-namespace X10D.Collections;
-
-/// <summary>
-///     Collection-related extension methods for <see cref="IBinaryInteger{T}" />.
-/// </summary>
-public static class BinaryIntegerExtensions
-{
-    /// <summary>
-    ///     Unpacks this integer into a boolean list, treating it as a bit field.
-    /// </summary>
-    /// <param name="value">The value to unpack.</param>
-    /// <returns>An array of <see cref="bool" /> with a length equal to the size of <typeparamref name="TInteger" />.</returns>
-    [Pure]
-    [MethodImpl(CompilerResources.MaxOptimization)]
-    public static bool[] Unpack<TInteger>(this TInteger value)
-        where TInteger : unmanaged, IBinaryInteger<TInteger>
-    {
-        unsafe
-        {
-            var buffer = new bool[sizeof(TInteger) * 8];
-            value.Unpack(buffer);
-            return buffer;
-        }
-    }
-
-    /// <summary>
-    ///     Unpacks this integer into a boolean list, treating it as a bit field.
-    /// </summary>
-    /// <param name="value">The value to unpack.</param>
-    /// <param name="destination">When this method returns, contains the unpacked booleans from <paramref name="value" />.</param>
-    /// <exception cref="ArgumentException"><paramref name="destination" /> is not large enough to contain the result.</exception>
-    [MethodImpl(CompilerResources.MaxOptimization)]
-    public static void Unpack<TInteger>(this TInteger value, Span<bool> destination)
-        where TInteger : unmanaged, IBinaryInteger<TInteger>
-    {
-        unsafe
-        {
-            if (destination.Length < sizeof(TInteger) * 8)
-            {
-                throw new ArgumentException(ExceptionMessages.DestinationSpanLengthTooShort, nameof(destination));
-            }
-        }
-
-        UnpackInternal(value, destination);
-    }
-
-    [MethodImpl(CompilerResources.MaxOptimization)]
-    private static void UnpackInternal_Fallback<TInteger>(this TInteger value, Span<bool> destination)
-        where TInteger : unmanaged, IBinaryInteger<TInteger>
-    {
-        unsafe
-        {
-            int bitCount = sizeof(TInteger) * 8;
-            for (var index = 0; index < bitCount; index++)
-            {
-                destination[index] = (value & (TInteger.One << index)) != TInteger.Zero;
-            }
-        }
-    }
-
-    [ExcludeFromCodeCoverage]
-    [MethodImpl(CompilerResources.MaxOptimization)]
-    private static void UnpackInternal<TInteger>(TInteger value, Span<bool> destination)
-        where TInteger : unmanaged, IBinaryInteger<TInteger>
-    {
-        switch (value)
-        {
-            case byte valueByte when Sse3.IsSupported:
-                valueByte.UnpackInternal_Ssse3(destination);
-                break;
-
-            case int valueInt32 when Avx2.IsSupported:
-                valueInt32.UnpackInternal_Ssse3(destination);
-                break;
-
-            case int valueInt32 when Sse3.IsSupported:
-                valueInt32.UnpackInternal_Ssse3(destination);
-                break;
-
-            case short valueInt16 when Sse3.IsSupported:
-                valueInt16.UnpackInternal_Ssse3(destination);
-                break;
-
-            default:
-                UnpackInternal_Fallback(value, destination);
-                break;
-        }
-    }
-}
-#endif

X10D/src/Collections/ByteExtensions.cs

@@ -1,7 +1,5 @@
-#if !NET7_0_OR_GREATER
 using System.Diagnostics.CodeAnalysis;
 using System.Diagnostics.Contracts;
-#endif
 using System.Runtime.CompilerServices;
 using System.Runtime.Intrinsics;
 using System.Runtime.Intrinsics.X86;
@@ -16,7 +14,6 @@ public static class ByteExtensions
 {
     private const int Size = sizeof(byte) * 8;
 
-#if !NET7_0_OR_GREATER
     /// <summary>
     ///     Unpacks this 8-bit unsigned integer into a boolean list, treating it as a bit field.
     /// </summary>
@@ -54,7 +51,6 @@ public static class ByteExtensions
 
         UnpackInternal_Fallback(value, destination);
     }
-#endif
 
     [MethodImpl(CompilerResources.MaxOptimization)]
     internal static void UnpackInternal_Fallback(this byte value, Span<bool> destination)

X10D/src/Collections/Int16Extensions.cs

@@ -1,7 +1,5 @@
-#if !NET7_0_OR_GREATER
 using System.Diagnostics.CodeAnalysis;
 using System.Diagnostics.Contracts;
-#endif
 using System.Runtime.CompilerServices;
 using System.Runtime.Intrinsics;
 using System.Runtime.Intrinsics.X86;
@@ -16,7 +14,6 @@ public static class Int16Extensions
 {
     private const int Size = sizeof(short) * 8;
 
-#if !NET7_0_OR_GREATER
     /// <summary>
     ///     Unpacks this 16-bit signed integer into a boolean list, treating it as a bit field.
     /// </summary>
@@ -54,7 +51,6 @@ public static class Int16Extensions
 
         UnpackInternal_Fallback(value, destination);
     }
-#endif
 
     [MethodImpl(CompilerResources.MaxOptimization)]
     internal static void UnpackInternal_Fallback(this short value, Span<bool> destination)

X10D/src/Collections/Int32Extensions.cs

@@ -1,7 +1,5 @@
-#if !NET7_0_OR_GREATER
 using System.Diagnostics.CodeAnalysis;
 using System.Diagnostics.Contracts;
-#endif
 using System.Runtime.CompilerServices;
 using System.Runtime.Intrinsics;
 using System.Runtime.Intrinsics.X86;
@@ -16,7 +14,6 @@ public static class Int32Extensions
 {
     private const int Size = sizeof(int) * 8;
 
-#if !NET7_0_OR_GREATER
     /// <summary>
     ///     Unpacks this 32-bit signed integer into a boolean list, treating it as a bit field.
     /// </summary>
@@ -60,7 +57,6 @@ public static class Int32Extensions
 
         UnpackInternal_Fallback(value, destination);
     }
-#endif
 
     [MethodImpl(CompilerResources.MaxOptimization)]
     internal static void UnpackInternal_Fallback(this int value, Span<bool> destination)

X10D/src/Collections/Int64Extensions.cs

@@ -1,4 +1,3 @@
-#if !NET7_0_OR_GREATER
 using System.Diagnostics.Contracts;
 
 namespace X10D.Collections;
@@ -42,4 +41,3 @@ public static class Int64Extensions
         }
     }
 }
-#endif

X10D/src/IO/DoubleExtensions.cs

@@ -1,4 +1,4 @@
-using System.Buffers.Binary;
+using System.Buffers.Binary;
 using System.Diagnostics.Contracts;
 using System.Runtime.InteropServices;
 

X10D/src/IO/Int16Extensions.cs

@@ -1,4 +1,4 @@
-using System.Buffers.Binary;
+using System.Buffers.Binary;
 using System.Diagnostics.Contracts;
 
 namespace X10D.IO;

X10D/src/IO/Int32Extensions.cs

@@ -1,4 +1,4 @@
-using System.Buffers.Binary;
+using System.Buffers.Binary;
 using System.Diagnostics.Contracts;
 
 namespace X10D.IO;

X10D/src/IO/Int64Extensions.cs

@@ -1,4 +1,4 @@
-using System.Buffers.Binary;
+using System.Buffers.Binary;
 using System.Diagnostics.Contracts;
 
 namespace X10D.IO;

X10D/src/IO/SingleExtensions.cs

@@ -1,4 +1,4 @@
-using System.Buffers.Binary;
+using System.Buffers.Binary;
 using System.Diagnostics.Contracts;
 #if !NET5_0_OR_GREATER
 using System.Runtime.InteropServices;

X10D/src/IO/UInt16Extensions.cs

@@ -1,4 +1,4 @@
-using System.Buffers.Binary;
+using System.Buffers.Binary;
 using System.Diagnostics.Contracts;
 
 namespace X10D.IO;

X10D/src/IO/UInt32Extensions.cs

@@ -1,4 +1,4 @@
-using System.Buffers.Binary;
+using System.Buffers.Binary;
 using System.Diagnostics.Contracts;
 
 namespace X10D.IO;

X10D/src/IO/UInt64Extensions.cs

@@ -1,4 +1,4 @@
-using System.Buffers.Binary;
+using System.Buffers.Binary;
 using System.Diagnostics.Contracts;
 
 namespace X10D.IO;

X10D/src/Math/BigIntegerExtensions.cs

@@ -10,7 +10,6 @@ namespace X10D.Math;
 /// </summary>
 public static class BigIntegerExtensions
 {
-#if !NET7_0_OR_GREATER
     /// <summary>
     ///     Returns the number of digits in the current integer.
     /// </summary>
@@ -43,7 +42,6 @@ public static class BigIntegerExtensions
         BigInteger root = BigInteger.Abs(value).Mod(9);
         return (int)(root == 0 ? 9 : root);
     }
-#endif
 
     /// <summary>
     ///     Returns the factorial of the current 64-bit signed integer.
@@ -172,7 +170,6 @@ public static class BigIntegerExtensions
         return value * other / value.GreatestCommonFactor(other);
     }
 
-#if !NET7_0_OR_GREATER
     /// <summary>
     ///     Performs a modulo operation which supports a negative dividend.
     /// </summary>
@@ -194,7 +191,6 @@ public static class BigIntegerExtensions
         BigInteger r = dividend % divisor;
         return r < 0 ? r + divisor : r;
     }
-#endif
 
     /// <summary>
     ///     Returns the multiplicative persistence of a specified value.

X10D/src/Math/BinaryIntegerExtensions.cs

@@ -1,101 +0,0 @@
-#if NET7_0_OR_GREATER
-using System.Diagnostics.Contracts;
-using System.Numerics;
-using System.Runtime.CompilerServices;
-using X10D.CompilerServices;
-
-namespace X10D.Math;
-
-/// <summary>
-///     Math-related extension methods for <see cref="IBinaryInteger{TSelf}" />.
-/// </summary>
-public static class BinaryIntegerExtensions
-{
-    /// <summary>
-    ///     Returns the number of digits in the current binary integer.
-    /// </summary>
-    /// <param name="value">The value whose digit count to compute.</param>
-    /// <returns>The number of digits in <paramref name="value" />.</returns>
-    [Pure]
-    [MethodImpl(CompilerResources.MaxOptimization)]
-    public static int CountDigits<TInteger>(this TInteger value)
-        where TInteger : IBinaryInteger<TInteger>
-    {
-        if (TInteger.IsZero(value))
-        {
-            return 1;
-        }
-
-        return 1 + (int)System.Math.Floor(System.Math.Log10(System.Math.Abs(double.CreateChecked(value))));
-    }
-
-    /// <summary>
-    ///     Computes the digital root of this integer.
-    /// </summary>
-    /// <param name="value">The value whose digital root to compute.</param>
-    /// <returns>The digital root of <paramref name="value" />.</returns>
-    /// <remarks>The digital root is defined as the recursive sum of digits until that result is a single digit.</remarks>
-    /// <remarks>
-    ///     <para>The digital root is defined as the recursive sum of digits until that result is a single digit.</para>
-    ///     <para>For example, the digital root of 239 is 5: <c>2 + 3 + 9 = 14</c>, then <c>1 + 4 = 5</c>.</para>
-    /// </remarks>
-    [Pure]
-    [MethodImpl(CompilerResources.MaxOptimization)]
-    public static int DigitalRoot<TInteger>(this TInteger value)
-        where TInteger : IBinaryInteger<TInteger>
-    {
-        var nine = TInteger.CreateChecked(9);
-        TInteger root = TInteger.Abs(value).Mod(nine);
-        return int.CreateChecked(root == TInteger.Zero ? nine : root);
-    }
-
-    /// <summary>
-    ///     Returns the factorial of the current binary integer.
-    /// </summary>
-    /// <param name="value">The value whose factorial to compute.</param>
-    /// <returns>The factorial of <paramref name="value" />.</returns>
-    /// <exception cref="ArithmeticException"><paramref name="value" /> is less than 0.</exception>
-    [Pure]
-    [MethodImpl(CompilerResources.MaxOptimization)]
-    public static long Factorial<TInteger>(this TInteger value)
-        where TInteger : IBinaryInteger<TInteger>
-    {
-        if (value < TInteger.Zero)
-        {
-            throw new ArithmeticException(nameof(value));
-        }
-
-        if (value == TInteger.Zero)
-        {
-            return 1;
-        }
-
-        var result = 1L;
-        for (TInteger i = TInteger.One; i <= value; i++)
-        {
-            result *= long.CreateChecked(i);
-        }
-
-        return result;
-    }
-
-    /// <summary>
-    ///     Calculates the greatest common factor between the current binary integer, and another binary integer.
-    /// </summary>
-    /// <param name="value">The first value.</param>
-    /// <param name="other">The second value.</param>
-    /// <returns>The greatest common factor between <paramref name="value" /> and <paramref name="other" />.</returns>
-    [Pure]
-    [MethodImpl(CompilerResources.MaxOptimization)]
-    public static TInteger GreatestCommonFactor<TInteger>(this TInteger value, TInteger other)
-        where TInteger : IBinaryInteger<TInteger>
-    {
-        while (other != TInteger.Zero)
-        {
-            (value, other) = (other, value % other);
-        }
-
-        return value;
-    }
-}
-#endif

X10D/src/Math/ByteExtensions.cs

@@ -9,7 +9,6 @@ namespace X10D.Math;
 /// </summary>
 public static class ByteExtensions
 {
-#if !NET7_0_OR_GREATER
     /// <summary>
     ///     Returns the number of digits in the current 8-bit unsigned integer.
     /// </summary>
@@ -108,7 +107,6 @@ public static class ByteExtensions
     {
         return !value.IsEven();
     }
-#endif
 
     /// <summary>
     ///     Returns a value indicating whether the current value is a prime number.

X10D/src/Math/Int16Extensions.cs

@@ -9,7 +9,6 @@ namespace X10D.Math;
 /// </summary>
 public static class Int16Extensions
 {
-#if !NET7_0_OR_GREATER
     /// <summary>
     ///     Returns the number of digits in the current 16-bit signed integer.
     /// </summary>
@@ -113,7 +112,6 @@ public static class Int16Extensions
     {
         return !value.IsEven();
     }
-#endif
 
     /// <summary>
     ///     Returns a value indicating whether the current value is a prime number.
@@ -142,7 +140,6 @@ public static class Int16Extensions
         return (short)((long)value).LowestCommonMultiple(other);
     }
 
-#if !NET7_0_OR_GREATER
     /// <summary>
     ///     Performs a modulo operation which supports a negative dividend.
     /// </summary>
@@ -164,7 +161,6 @@ public static class Int16Extensions
         int r = dividend % divisor;
         return (short)(r < 0 ? r + divisor : r);
     }
-#endif
 
     /// <summary>
     ///     Returns the multiplicative persistence of a specified value.

X10D/src/Math/Int32Extensions.cs

@@ -9,7 +9,6 @@ namespace X10D.Math;
 /// </summary>
 public static class Int32Extensions
 {
-#if !NET7_0_OR_GREATER
     /// <summary>
     ///     Returns the number of digits in the current 32-bit signed integer.
     /// </summary>
@@ -113,7 +112,6 @@ public static class Int32Extensions
     {
         return !value.IsEven();
     }
-#endif
 
     /// <summary>
     ///     Returns a value indicating whether the current value is a prime number.
@@ -142,7 +140,6 @@ public static class Int32Extensions
         return (int)((long)value).LowestCommonMultiple(other);
     }
 
-#if !NET7_0_OR_GREATER
     /// <summary>
     ///     Performs a modulo operation which supports a negative dividend.
     /// </summary>
@@ -164,7 +161,6 @@ public static class Int32Extensions
         int r = dividend % divisor;
         return r < 0 ? r + divisor : r;
     }
-#endif
 
     /// <summary>
     ///     Returns the multiplicative persistence of a specified value.

X10D/src/Math/Int64Extensions.cs

@@ -9,7 +9,6 @@ namespace X10D.Math;
 /// </summary>
 public static class Int64Extensions
 {
-#if !NET7_0_OR_GREATER
     /// <summary>
     ///     Returns the number of digits in the current 64-bit signed integer.
     /// </summary>
@@ -118,7 +117,6 @@ public static class Int64Extensions
     {
         return !value.IsEven();
     }
-#endif
 
     /// <summary>
     ///     Returns a value indicating whether the current value is a prime number.
@@ -181,7 +179,6 @@ public static class Int64Extensions
         return value * other / value.GreatestCommonFactor(other);
     }
 
-#if !NET7_0_OR_GREATER
     /// <summary>
     ///     Performs a modulo operation which supports a negative dividend.
     /// </summary>
@@ -203,7 +200,6 @@ public static class Int64Extensions
         long r = dividend % divisor;
         return r < 0 ? r + divisor : r;
     }
-#endif
 
     /// <summary>
     ///     Returns the multiplicative persistence of a specified value.

X10D/src/Math/MathUtility.cs

@@ -1,5 +1,4 @@
 using System.Diagnostics.Contracts;
-using System.Numerics;
 using System.Runtime.CompilerServices;
 using X10D.CompilerServices;
 
@@ -13,6 +12,34 @@ public static class MathUtility
     private const double DefaultGamma = 2.2;
     private const float DefaultGammaF = 2.2f;
 
+    /// <summary>
+    ///     Applies a simple bias function to value.
+    /// </summary>
+    /// <param name="value">The value to which the bias function will be applied.</param>
+    /// <param name="bias">The bias value. Valid values range from 0-1.</param>
+    /// <returns>The biased result.</returns>
+    /// <remarks>
+    ///     If <paramref name="bias" /> is less than 0.5, <paramref name="value" /> will be shifted downward; otherwise, upward.
+    /// </remarks>
+    public static float Bias(float value, float bias)
+    {
+        return value / ((1.0f / bias - 2.0f) * (1.0f - value) + 1.0f);
+    }
+
+    /// <summary>
+    ///     Applies a simple bias function to value.
+    /// </summary>
+    /// <param name="value">The value to which the bias function will be applied.</param>
+    /// <param name="bias">The bias value. Valid values range from 0-1.</param>
+    /// <returns>The biased result.</returns>
+    /// <remarks>
+    ///     If <paramref name="bias" /> is less than 0.5, <paramref name="value" /> will be shifted downward; otherwise, upward.
+    /// </remarks>
+    public static double Bias(double value, double bias)
+    {
+        return value / ((1.0 / bias - 2.0) * (1.0 - value) + 1.0);
+    }
+
     /// <summary>
     ///     Calculates exponential decay for a value.
     /// </summary>
@@ -127,35 +154,6 @@ public static class MathUtility
         return (alpha - start) / (end - start);
     }
 
-#if !NET7_0_OR_GREATER
-    /// <summary>
-    ///     Applies a simple bias function to value.
-    /// </summary>
-    /// <param name="value">The value to which the bias function will be applied.</param>
-    /// <param name="bias">The bias value. Valid values range from 0-1.</param>
-    /// <returns>The biased result.</returns>
-    /// <remarks>
-    ///     If <paramref name="bias" /> is less than 0.5, <paramref name="value" /> will be shifted downward; otherwise, upward.
-    /// </remarks>
-    public static float Bias(float value, float bias)
-    {
-        return value / ((1.0f / bias - 2.0f) * (1.0f - value) + 1.0f);
-    }
-
-    /// <summary>
-    ///     Applies a simple bias function to value.
-    /// </summary>
-    /// <param name="value">The value to which the bias function will be applied.</param>
-    /// <param name="bias">The bias value. Valid values range from 0-1.</param>
-    /// <returns>The biased result.</returns>
-    /// <remarks>
-    ///     If <paramref name="bias" /> is less than 0.5, <paramref name="value" /> will be shifted downward; otherwise, upward.
-    /// </remarks>
-    public static double Bias(double value, double bias)
-    {
-        return value / ((1.0 / bias - 2.0) * (1.0 - value) + 1.0);
-    }
-
     /// <summary>
     ///     Linearly interpolates from one value to a target using a specified alpha.
     /// </summary>
@@ -192,93 +190,6 @@ public static class MathUtility
         return ((1.0 - alpha) * value) + (alpha * target);
     }
 
-    /// <summary>
-    ///     Performs smooth Hermite interpolation from one value to a target using a specified alpha.
-    /// </summary>
-    /// <param name="value">The interpolation source.</param>
-    /// <param name="target">The interpolation target.</param>
-    /// <param name="alpha">The interpolation alpha.</param>
-    /// <returns>The interpolation result.</returns>
-    public static float SmoothStep(float value, float target, float alpha)
-    {
-        alpha = System.Math.Clamp(alpha, 0.0f, 1.0f);
-        alpha = -2.0f * alpha * alpha * alpha + 3.0f * alpha * alpha;
-        return target * alpha + value * (1.0f - alpha);
-    }
-
-    /// <summary>
-    ///     Performs smooth Hermite interpolation from one value to a target using a specified alpha.
-    /// </summary>
-    /// <param name="value">The interpolation source.</param>
-    /// <param name="target">The interpolation target.</param>
-    /// <param name="alpha">The interpolation alpha.</param>
-    /// <returns>The interpolation result.</returns>
-    public static double SmoothStep(double value, double target, double alpha)
-    {
-        alpha = System.Math.Clamp(alpha, 0.0, 1.0);
-        alpha = -2.0 * alpha * alpha * alpha + 3.0 * alpha * alpha;
-        return target * alpha + value * (1.0 - alpha);
-    }
-
-    /// <summary>
-    ///     Converts a value from being a percentage of one range, to being the same percentage in a new range.
-    /// </summary>
-    /// <param name="value">The value to convert.</param>
-    /// <param name="oldMin">The old minimum value.</param>
-    /// <param name="oldMax">The old maximum value.</param>
-    /// <param name="newMin">The new minimum value.</param>
-    /// <param name="newMax">The new maximum value.</param>
-    /// <returns>The scaled value.</returns>
-    [Pure]
-    [MethodImpl(CompilerResources.MaxOptimization)]
-    public static float ScaleRange(float value, float oldMin, float oldMax, float newMin, float newMax)
-    {
-        float oldRange = oldMax - oldMin;
-        float newRange = newMax - newMin;
-        float alpha = (value - oldMin) / oldRange;
-        return (alpha * newRange) + newMin;
-    }
-
-    /// <summary>
-    ///     Converts a value from being a percentage of one range, to being the same percentage in a new range.
-    /// </summary>
-    /// <param name="value">The value to convert.</param>
-    /// <param name="oldMin">The old minimum value.</param>
-    /// <param name="oldMax">The old maximum value.</param>
-    /// <param name="newMin">The new minimum value.</param>
-    /// <param name="newMax">The new maximum value.</param>
-    /// <returns>The scaled value.</returns>
-    [Pure]
-    [MethodImpl(CompilerResources.MaxOptimization)]
-    public static double ScaleRange(double value, double oldMin, double oldMax, double newMin, double newMax)
-    {
-        double oldRange = oldMax - oldMin;
-        double newRange = newMax - newMin;
-        double alpha = (value - oldMin) / oldRange;
-        return (alpha * newRange) + newMin;
-    }
-
-    /// <summary>
-    ///     Returns the incremental sawtooth wave of a given value.
-    /// </summary>
-    /// <param name="value">The value to calculate.</param>
-    /// <returns>The sawtooth wave of the given value.</returns>
-    public static float Sawtooth(float value)
-    {
-        return (value - MathF.Floor(value));
-    }
-
-    /// <summary>
-    ///     Returns the incremental sawtooth wave of a given value.
-    /// </summary>
-    /// <param name="value">The value to calculate.</param>
-    /// <returns>The sawtooth wave of the given value.</returns>
-    public static double Sawtooth(double value)
-    {
-        return (value - System.Math.Floor(value));
-    }
-#endif
-
     /// <summary>
     ///     Converts a linear value to a gamma-encoded value using a gamma value of <c>2.2</c>.
     /// </summary>
@@ -361,6 +272,64 @@ public static class MathUtility
         return Unsafe.As<bool, int>(ref result);
     }
 
+    /// <summary>
+    ///     Returns the incremental sawtooth wave of a given value.
+    /// </summary>
+    /// <param name="value">The value to calculate.</param>
+    /// <returns>The sawtooth wave of the given value.</returns>
+    public static float Sawtooth(float value)
+    {
+        return (value - MathF.Floor(value));
+    }
+
+    /// <summary>
+    ///     Returns the incremental sawtooth wave of a given value.
+    /// </summary>
+    /// <param name="value">The value to calculate.</param>
+    /// <returns>The sawtooth wave of the given value.</returns>
+    public static double Sawtooth(double value)
+    {
+        return (value - System.Math.Floor(value));
+    }
+
+    /// <summary>
+    ///     Converts a value from being a percentage of one range, to being the same percentage in a new range.
+    /// </summary>
+    /// <param name="value">The value to convert.</param>
+    /// <param name="oldMin">The old minimum value.</param>
+    /// <param name="oldMax">The old maximum value.</param>
+    /// <param name="newMin">The new minimum value.</param>
+    /// <param name="newMax">The new maximum value.</param>
+    /// <returns>The scaled value.</returns>
+    [Pure]
+    [MethodImpl(CompilerResources.MaxOptimization)]
+    public static float ScaleRange(float value, float oldMin, float oldMax, float newMin, float newMax)
+    {
+        float oldRange = oldMax - oldMin;
+        float newRange = newMax - newMin;
+        float alpha = (value - oldMin) / oldRange;
+        return (alpha * newRange) + newMin;
+    }
+
+    /// <summary>
+    ///     Converts a value from being a percentage of one range, to being the same percentage in a new range.
+    /// </summary>
+    /// <param name="value">The value to convert.</param>
+    /// <param name="oldMin">The old minimum value.</param>
+    /// <param name="oldMax">The old maximum value.</param>
+    /// <param name="newMin">The new minimum value.</param>
+    /// <param name="newMax">The new maximum value.</param>
+    /// <returns>The scaled value.</returns>
+    [Pure]
+    [MethodImpl(CompilerResources.MaxOptimization)]
+    public static double ScaleRange(double value, double oldMin, double oldMax, double newMin, double newMax)
+    {
+        double oldRange = oldMax - oldMin;
+        double newRange = newMax - newMin;
+        double alpha = (value - oldMin) / oldRange;
+        return (alpha * newRange) + newMin;
+    }
+
     /// <summary>
     ///     Calculates the sigmoid function for the given input value.
     /// </summary>
@@ -389,71 +358,18 @@ public static class MathUtility
         return 1.0f / (1.0f + System.Math.Exp(-value));
     }
 
-#if NET7_0_OR_GREATER
     /// <summary>
-    ///     Applies a simple bias function to value.
-    /// </summary>
-    /// <param name="value">The value to which the bias function will be applied.</param>
-    /// <param name="bias">The bias value. Valid values range from 0-1.</param>
-    /// <returns>The biased result.</returns>
-    /// <remarks>
-    ///     If <paramref name="bias" /> is less than 0.5, <paramref name="value" /> will be shifted downward; otherwise, upward.
-    /// </remarks>
-    public static TNumber Bias<TNumber>(TNumber value, TNumber bias)
-        where TNumber : INumber<TNumber>
-    {
-        TNumber identity = TNumber.MultiplicativeIdentity;
-        return value / ((identity / bias - TNumber.CreateChecked(2)) * (identity - value) + identity);
-    }
-
-    /// <summary>
-    ///     Linearly interpolates from one value to a target using a specified alpha.
+    ///     Performs smooth Hermite interpolation from one value to a target using a specified alpha.
     /// </summary>
     /// <param name="value">The interpolation source.</param>
     /// <param name="target">The interpolation target.</param>
     /// <param name="alpha">The interpolation alpha.</param>
-    /// <returns>
-    ///     The interpolation result as determined by <c>(1 - alpha) * value + alpha * target</c>.
-    /// </returns>
-    [Pure]
-    [MethodImpl(CompilerResources.MaxOptimization)]
-    public static TNumber Lerp<TNumber>(TNumber value, TNumber target, TNumber alpha)
-        where TNumber : INumber<TNumber>
+    /// <returns>The interpolation result.</returns>
+    public static float SmoothStep(float value, float target, float alpha)
     {
-        // rookie mistake: a + t * (b - a)
-        // "precise" method: (1 - t) * a + t * b
-        return ((TNumber.MultiplicativeIdentity - alpha) * value) + (alpha * target);
-    }
-
-    /// <summary>
-    ///     Returns the incremental sawtooth wave of a given value.
-    /// </summary>
-    /// <param name="value">The value to calculate.</param>
-    /// <returns>The sawtooth wave of the given value.</returns>
-    public static TNumber Sawtooth<TNumber>(TNumber value)
-        where TNumber : IFloatingPoint<TNumber>
-    {
-        return (value - TNumber.Floor(value));
-    }
-
-    /// <summary>
-    ///     Converts a value from being a percentage of one range, to being the same percentage in a new range.
-    /// </summary>
-    /// <param name="value">The value to convert.</param>
-    /// <param name="oldMin">The old minimum value.</param>
-    /// <param name="oldMax">The old maximum value.</param>
-    /// <param name="newMin">The new minimum value.</param>
-    /// <param name="newMax">The new maximum value.</param>
-    /// <returns>The scaled value.</returns>
-    [Pure]
-    [MethodImpl(CompilerResources.MaxOptimization)]
-    public static TNumber ScaleRange<TNumber>(TNumber value, TNumber oldMin, TNumber oldMax, TNumber newMin, TNumber newMax)
-        where TNumber : INumber<TNumber>
-    {
-        TNumber oldRange = oldMax - oldMin;
-        TNumber newRange = newMax - newMin;
-        TNumber alpha = (value - oldMin) / oldRange;
-        return (alpha * newRange) + newMin;
+        alpha = System.Math.Clamp(alpha, 0.0f, 1.0f);
+        alpha = -2.0f * alpha * alpha * alpha + 3.0f * alpha * alpha;
+        return target * alpha + value * (1.0f - alpha);
     }
 
     /// <summary>
@@ -463,16 +379,10 @@ public static class MathUtility
     /// <param name="target">The interpolation target.</param>
     /// <param name="alpha">The interpolation alpha.</param>
     /// <returns>The interpolation result.</returns>
-    public static TNumber SmoothStep<TNumber>(TNumber value, TNumber target, TNumber alpha)
-        where TNumber : INumber<TNumber>
+    public static double SmoothStep(double value, double target, double alpha)
     {
-        TNumber one = TNumber.One;
-        TNumber two = one + one;
-        TNumber three = two + one;
-
-        alpha = TNumber.Clamp(alpha, TNumber.Zero, TNumber.One);
-        alpha = -two * alpha * alpha * alpha + three * alpha * alpha;
-        return target * alpha + value * (one - alpha);
+        alpha = System.Math.Clamp(alpha, 0.0, 1.0);
+        alpha = -2.0 * alpha * alpha * alpha + 3.0 * alpha * alpha;
+        return target * alpha + value * (1.0 - alpha);
     }
-#endif
 }

X10D/src/Math/NumberExtensions.cs

@@ -1,104 +0,0 @@
-#if NET7_0_OR_GREATER
-using System.Diagnostics.Contracts;
-using System.Numerics;
-using System.Runtime.CompilerServices;
-using X10D.CompilerServices;
-
-namespace X10D.Math;
-
-/// <summary>
-///     Math-related extension methods for <see cref="INumber{TSelf}" />.
-/// </summary>
-public static class NumberExtensions
-{
-    /// <summary>
-    ///     Returns a value indicating whether the current value is evenly divisible by 2.
-    /// </summary>
-    /// <param name="value">The value whose parity to check.</param>
-    /// <returns>
-    ///     <see langword="true" /> if <paramref name="value" /> is evenly divisible by 2, or <see langword="false" />
-    ///     otherwise.
-    /// </returns>
-    [Pure]
-    [MethodImpl(CompilerResources.MaxOptimization)]
-    public static bool IsEven<TNumber>(this TNumber value)
-        where TNumber : INumber<TNumber>
-    {
-        return value % TNumber.CreateChecked(2) == TNumber.Zero;
-    }
-
-    /// <summary>
-    ///     Returns a value indicating whether the current value is not evenly divisible by 2.
-    /// </summary>
-    /// <param name="value">The value whose parity to check.</param>
-    /// <returns>
-    ///     <see langword="true" /> if <paramref name="value" /> is not evenly divisible by 2, or <see langword="false" />
-    ///     otherwise.
-    /// </returns>
-    [Pure]
-    [MethodImpl(CompilerResources.MaxOptimization)]
-    public static bool IsOdd<TNumber>(this TNumber value)
-        where TNumber : INumber<TNumber>
-    {
-        return !value.IsEven();
-    }
-
-    /// <summary>
-    ///     Performs a modulo operation which supports a negative dividend.
-    /// </summary>
-    /// <param name="dividend">The dividend.</param>
-    /// <param name="divisor">The divisor.</param>
-    /// <returns>The result of <c>dividend mod divisor</c>.</returns>
-    /// <remarks>
-    ///     The <c>%</c> operator (commonly called the modulo operator) in C# is not defined to be modulo, but is instead
-    ///     remainder. This quirk inherently makes it difficult to use modulo in a negative context, as <c>x % y</c> where x is
-    ///     negative will return a negative value, akin to <c>-(x % y)</c>, even if precedence is forced. This method provides a
-    ///     modulo operation which supports negative dividends.
-    /// </remarks>
-    /// <author>ShreevatsaR, https://stackoverflow.com/a/1082938/1467293</author>
-    /// <license>CC-BY-SA 2.5</license>
-    [Pure]
-    [MethodImpl(CompilerResources.MaxOptimization)]
-    public static TNumber Mod<TNumber>(this TNumber dividend, TNumber divisor)
-        where TNumber : INumber<TNumber>
-    {
-        TNumber r = dividend % divisor;
-        return r < TNumber.Zero ? r + divisor : r;
-    }
-
-    /// <summary>
-    ///     Returns an integer that indicates the sign of this number.
-    /// </summary>
-    /// <param name="value">A signed number.</param>
-    /// <returns>
-    ///     A number that indicates the sign of <paramref name="value" />, as shown in the following table.
-    ///
-    ///     <list type="table">
-    ///         <listheader>
-    ///             <term>Return value</term>
-    ///             <description>Meaning</description>
-    ///         </listheader>
-    ///
-    ///         <item>
-    ///             <term>-1</term>
-    ///             <description><paramref name="value" /> is less than zero.</description>
-    ///         </item>
-    ///         <item>
-    ///             <term>0</term>
-    ///             <description><paramref name="value" /> is equal to zero.</description>
-    ///         </item>
-    ///         <item>
-    ///             <term>1</term>
-    ///             <description><paramref name="value" /> is greater than zero.</description>
-    ///         </item>
-    ///     </list>
-    /// </returns>
-    [Pure]
-    [MethodImpl(CompilerResources.MaxOptimization)]
-    public static int Sign<TNumber>(this TNumber value)
-        where TNumber : INumber<TNumber>
-    {
-        return TNumber.Sign(value);
-    }
-}
-#endif

X10D/src/Math/SByteExtensions.cs

@@ -10,7 +10,6 @@ namespace X10D.Math;
 [CLSCompliant(false)]
 public static class SByteExtensions
 {
-#if !NET7_0_OR_GREATER
     /// <summary>
     ///     Returns the number of digits in the current 8-bit signed integer.
     /// </summary>
@@ -114,7 +113,6 @@ public static class SByteExtensions
     {
         return !value.IsEven();
     }
-#endif
 
     /// <summary>
     ///     Returns a value indicating whether the current value is a prime number.
@@ -143,7 +141,6 @@ public static class SByteExtensions
         return (sbyte)((long)value).LowestCommonMultiple(other);
     }
 
-#if !NET7_0_OR_GREATER
     /// <summary>
     ///     Performs a modulo operation which supports a negative dividend.
     /// </summary>
@@ -165,7 +162,6 @@ public static class SByteExtensions
         int r = dividend % divisor;
         return (sbyte)(r < 0 ? r + divisor : r);
     }
-#endif
 
     /// <summary>
     ///     Returns the multiplicative persistence of a specified value.

X10D/src/Math/UInt16Extensions.cs

@@ -10,7 +10,6 @@ namespace X10D.Math;
 [CLSCompliant(false)]
 public static class UInt16Extensions
 {
-#if !NET7_0_OR_GREATER
     /// <summary>
     ///     Returns the number of digits in the current 16-bit signed integer.
     /// </summary>
@@ -95,6 +94,20 @@ public static class UInt16Extensions
         return (value & 1) == 0;
     }
 
+    /// <summary>
+    ///     Returns a value indicating whether the current value is a prime number.
+    /// </summary>
+    /// <param name="value">The value whose primality to check.</param>
+    /// <returns>
+    ///     <see langword="true" /> if <paramref name="value" /> is prime; otherwise, <see langword="false" />.
+    /// </returns>
+    [Pure]
+    [MethodImpl(CompilerResources.MaxOptimization)]
+    public static bool IsPrime(this ushort value)
+    {
+        return ((ulong)value).IsPrime();
+    }
+
     /// <summary>
     ///     Returns a value indicating whether the current value is not evenly divisible by 2.
     /// </summary>
@@ -109,21 +122,6 @@ public static class UInt16Extensions
     {
         return !value.IsEven();
     }
-#endif
-
-    /// <summary>
-    ///     Returns a value indicating whether the current value is a prime number.
-    /// </summary>
-    /// <param name="value">The value whose primality to check.</param>
-    /// <returns>
-    ///     <see langword="true" /> if <paramref name="value" /> is prime; otherwise, <see langword="false" />.
-    /// </returns>
-    [Pure]
-    [MethodImpl(CompilerResources.MaxOptimization)]
-    public static bool IsPrime(this ushort value)
-    {
-        return ((ulong)value).IsPrime();
-    }
 
     /// <summary>
     ///     Calculates the lowest common multiple between the current 16-bit unsigned integer, and another 16-bit unsigned

X10D/src/Math/UInt32Extensions.cs

@@ -10,7 +10,6 @@ namespace X10D.Math;
 [CLSCompliant(false)]
 public static class UInt32Extensions
 {
-#if !NET7_0_OR_GREATER
     /// <summary>
     ///     Returns the number of digits in the current 32-bit unsigned integer.
     /// </summary>
@@ -95,6 +94,20 @@ public static class UInt32Extensions
         return (value & 1) == 0;
     }
 
+    /// <summary>
+    ///     Returns a value indicating whether the current value is a prime number.
+    /// </summary>
+    /// <param name="value">The value whose primality to check.</param>
+    /// <returns>
+    ///     <see langword="true" /> if <paramref name="value" /> is prime; otherwise, <see langword="false" />.
+    /// </returns>
+    [Pure]
+    [MethodImpl(CompilerResources.MaxOptimization)]
+    public static bool IsPrime(this uint value)
+    {
+        return ((ulong)value).IsPrime();
+    }
+
     /// <summary>
     ///     Returns a value indicating whether the current value is not evenly divisible by 2.
     /// </summary>
@@ -109,21 +122,6 @@ public static class UInt32Extensions
     {
         return !value.IsEven();
     }
-#endif
-
-    /// <summary>
-    ///     Returns a value indicating whether the current value is a prime number.
-    /// </summary>
-    /// <param name="value">The value whose primality to check.</param>
-    /// <returns>
-    ///     <see langword="true" /> if <paramref name="value" /> is prime; otherwise, <see langword="false" />.
-    /// </returns>
-    [Pure]
-    [MethodImpl(CompilerResources.MaxOptimization)]
-    public static bool IsPrime(this uint value)
-    {
-        return ((ulong)value).IsPrime();
-    }
 
     /// <summary>
     ///     Calculates the lowest common multiple between the current 32-bit unsigned integer, and another 32-bit unsigned

X10D/src/Math/UInt64Extensions.cs

@@ -10,7 +10,6 @@ namespace X10D.Math;
 [CLSCompliant(false)]
 public static class UInt64Extensions
 {
-#if !NET7_0_OR_GREATER
     /// <summary>
     ///     Returns the number of digits in the current 64-bit unsigned integer.
     /// </summary>
@@ -100,22 +99,6 @@ public static class UInt64Extensions
         return (value & 1) == 0;
     }
 
-    /// <summary>
-    ///     Returns a value indicating whether the current value is not evenly divisible by 2.
-    /// </summary>
-    /// <param name="value">The value whose parity to check.</param>
-    /// <returns>
-    ///     <see langword="true" /> if <paramref name="value" /> is not evenly divisible by 2, or <see langword="false" />
-    ///     otherwise.
-    /// </returns>
-    [Pure]
-    [MethodImpl(CompilerResources.MaxOptimization)]
-    public static bool IsOdd(this ulong value)
-    {
-        return !value.IsEven();
-    }
-#endif
-
     /// <summary>
     ///     Returns a value indicating whether the current value is a prime number.
     /// </summary>
@@ -149,6 +132,21 @@ public static class UInt64Extensions
         return true;
     }
 
+    /// <summary>
+    ///     Returns a value indicating whether the current value is not evenly divisible by 2.
+    /// </summary>
+    /// <param name="value">The value whose parity to check.</param>
+    /// <returns>
+    ///     <see langword="true" /> if <paramref name="value" /> is not evenly divisible by 2, or <see langword="false" />
+    ///     otherwise.
+    /// </returns>
+    [Pure]
+    [MethodImpl(CompilerResources.MaxOptimization)]
+    public static bool IsOdd(this ulong value)
+    {
+        return !value.IsEven();
+    }
+
     /// <summary>
     ///     Calculates the lowest common multiple between the current 64-bit unsigned integer, and another 64-bit unsigned
     ///     integer.

X10D/src/Time/Int16Extensions.cs

@@ -32,7 +32,7 @@ public static class Int16Extensions
             value++;
         }
 
-        return value.Mod((short)4) == 0 && (value.Mod((short)100) != 0 || value.Mod((short)400) == 0);
+        return value.Mod(4) == 0 && (value.Mod(100) != 0 || value.Mod(400) == 0);
     }
 
     /// <summary>

X10D/src/Time/SByteExtensions.cs

@@ -33,7 +33,7 @@ public static class SByteExtensions
             value++;
         }
 
-        return value.Mod((sbyte)4) == 0 && value.Mod((sbyte)100) != 0; // mod 400 not required, sbyte.MaxValue is 127 anyway
+        return value.Mod(4) == 0 && value.Mod(100) != 0; // mod 400 not required, sbyte.MaxValue is 127 anyway
     }
 
     /// <summary>