Reapply modulo helpers and inline fast remainders

EvenPerfectBitScanner.Benchmarks/Mod5ULongBenchmarks.cs

@@ -0,0 +1,26 @@
+using BenchmarkDotNet.Attributes;
+using BenchmarkDotNet.Jobs;
+using PerfectNumbers.Core;
+
+namespace EvenPerfectBitScanner.Benchmarks;
+
+[SimpleJob(RuntimeMoniker.Net80, launchCount: 1, warmupCount: 1, iterationCount: 5)]
+[MemoryDiagnoser]
+public class Mod5ULongBenchmarks
+{
+    [Params(5UL, 8191UL, 131071UL, 2147483647UL, ulong.MaxValue - 31UL)]
+    public ulong Value { get; set; }
+
+    [Benchmark(Baseline = true)]
+    public ulong ModuloOperator()
+    {
+        return Value % 5UL;
+    }
+
+    [Benchmark]
+    public ulong ExtensionMethod()
+    {
+        return Value.Mod5();
+    }
+}
+