Extension methods benchmarked. Slower alternatives replaced.

EvenPerfectBitScanner.Benchmarks/Mod128UInt128Benchmarks.cs

@@ -1,4 +1,3 @@
-using System.Numerics;
 using BenchmarkDotNet.Attributes;
 using BenchmarkDotNet.Jobs;
 using PerfectNumbers.Core;
@@ -12,12 +11,16 @@ public class Mod128UInt128Benchmarks
     [Params(128UL, 8191UL, 131071UL, 2147483647UL, ulong.MaxValue - 511UL)]
     public UInt128 Value { get; set; }
 
-    [Benchmark(Baseline = true)]
+	[Benchmark(Baseline = true)]
     public ulong ModuloOperator()
     {
         return (ulong)(Value % 128UL);
     }
 
+	/// <summary>
+	/// Fastest
+	/// </summary>
+	/// <returns></returns>
     [Benchmark]
     public ulong ExtensionMethod()
     {