Initial commit.

PerfectNumbers.Core/Cpu/CpuConstants.cs

@@ -0,0 +1,9 @@
+namespace PerfectNumbers.Core.Cpu;
+
+public static class CpuConstants
+{
+	// Allowed q mod 10 sets depending on last digit of M_p
+	public const int LastSevenMask10 = (1 << 7) | (1 << 9);
+	// For M_p ending with 1, restrict to {1,3,9}; 7 considered only for q == 7 (not possible for large p)
+	public const int LastOneMask10 = (1 << 1) | (1 << 3) | (1 << 9);
+}