Benchmarks extended. Small optimizations.

PerfectNumbers.Core/PerfectNumbersMath.cs

@@ -0,0 +1,21 @@
+using System.Runtime.CompilerServices;
+
+namespace PerfectNumbers.Core;
+
+public static class PerfectNumbersMath
+{
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static uint FastRemainder3(uint value)
+	{
+		uint quotient = (uint)(((ulong)value * 0xAAAAAAABUL) >> 33);
+		return value - quotient * 3U;
+	}
+
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public static uint FastRemainder5(uint value)
+	{
+		uint quotient = (uint)(((ulong)value * 0xCCCCCCCDUL) >> 34);
+		return value - quotient * 5U;
+	}
+
+}