mlemanczyk/even-perfect-numbers-scanner
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Switching .IsPrime check to CPU for much higher performance.

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mlemanczyk committed 2025-10-28 20:49:11 +01:00
1 parent ca8ab2bcf8
commit bead40713c
1 file changed
+2 -2
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PerfectNumbers.Core/MersenneDivisorCycles.cs
+2 -2
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@@ -411,7 +411,7 @@ public class MersenneDivisorCycles
// Atomic.Add(ref _tryFactorIntoCountsInternalHits, 1UL); // Atomic.Add(ref _tryFactorIntoCountsInternalHits, 1UL);
// Console.WriteLine($"MersenneDivisorCycles.TryFactorIntoCountsInternal hits {Volatile.Read(ref _tryFactorIntoCountsInternalHits)}"); // Console.WriteLine($"MersenneDivisorCycles.TryFactorIntoCountsInternal hits {Volatile.Read(ref _tryFactorIntoCountsInternalHits)}");
if (PrimeTester.IsPrimeGpu(remaining)) if (PrimeTester.IsPrimeCpu(remaining, CancellationToken.None))
// if (PrimeTester.IsPrimeCpu(remaining, CancellationToken.None)) // if (PrimeTester.IsPrimeCpu(remaining, CancellationToken.None))
{ {
AddFactor(counts, remaining); AddFactor(counts, remaining);
@@ -937,7 +937,7 @@ public class MersenneDivisorCycles
// } // }
// if (!skipPrimeOrderHeuristic && HeuristicPrimeTester.Exclusive.IsPrimeCpu(divisor, CancellationToken.None)) // if (!skipPrimeOrderHeuristic && HeuristicPrimeTester.Exclusive.IsPrimeCpu(divisor, CancellationToken.None))
if (!skipPrimeOrderHeuristic && PrimeTester.IsPrimeGpu(divisor)) if (!skipPrimeOrderHeuristic && PrimeTester.IsPrimeCpu(divisor, CancellationToken.None))
// if (!skipPrimeOrderHeuristic && PrimeTester.IsPrimeCpu(divisor, CancellationToken.None)) // if (!skipPrimeOrderHeuristic && PrimeTester.IsPrimeCpu(divisor, CancellationToken.None))
{ {
ulong computedOrder = PrimeOrderCalculator.Calculate( ulong computedOrder = PrimeOrderCalculator.Calculate(