mlemanczyk/even-perfect-numbers-scanner
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Allow residue GPU scanning to cover UInt128 divisors

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Marek Lemańczyk committed 2025-09-20 02:49:20 +02:00
1 parent 0a9b11e957
commit bc1ec6a3aa
6 files changed
+62 -56
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PerfectNumbers.Core/Cpu/MersenneNumberResidueCpuTester.cs
+4 -4
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@@ -10,12 +10,12 @@ public class MersenneNumberResidueCpuTester
UInt128 twoP,
bool lastIsSeven,
UInt128 perSetLimit,
ulong setCount,
UInt128 setCount,
UInt128 overallLimit,
ref bool isPrime,
ref bool divisorsExhausted)
{
if (setCount == 0UL || perSetLimit == UInt128.Zero || overallLimit == UInt128.Zero)
if (setCount == UInt128.Zero || perSetLimit == UInt128.Zero || overallLimit == UInt128.Zero)
{
return;
}
@@ -52,9 +52,9 @@ public class MersenneNumberResidueCpuTester
ModResidueTracker tracker = _mersenneResidueTracker!;
UInt128 limitInclusive = overallLimit + UInt128.One;
for (ulong setIndex = 0; setIndex < setCount && Volatile.Read(ref isPrime); setIndex++)
for (UInt128 setIndex = UInt128.Zero; setIndex < setCount && Volatile.Read(ref isPrime); setIndex++)
{
UInt128 setOffset = perSetLimit * (UInt128)setIndex;
UInt128 setOffset = perSetLimit * setIndex;
UInt128 k = setOffset + UInt128.One;
if (k >= limitInclusive)
{