mlemanczyk/even-perfect-numbers-scanner
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DivisorSet.Percentile, Additive and TopDown modes implemented. State files ported to LMDB => FASTER to avoid millions of files in folders.

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mlemanczyk committed 2026-01-04 12:17:27 +01:00
1 parent 27f65baf3d
commit 6a924f4041
18 files changed
+2619 -367
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PerfectNumbers.Core/Cpu/MersenneNumberDivisorByDivisorPrimeScanSessionWithTemplate.cs
+44 -23
View File
@@ -15,10 +15,18 @@ using TesterGpu = PerfectNumbers.Core.Cpu.MersenneNumberDivisorByDivisorCpuTeste
using TesterCpu = PerfectNumbers.Core.Cpu.MersenneNumberDivisorByDivisorCpuTesterWithForPredictiveDivisorSetForCpuOrder;
using TesterHybrid = PerfectNumbers.Core.Cpu.MersenneNumberDivisorByDivisorCpuTesterWithForPredictiveDivisorSetForHybridOrder;
using TesterGpu = PerfectNumbers.Core.Cpu.MersenneNumberDivisorByDivisorCpuTesterWithForPredictiveDivisorSetForGpuOrder;
#elif DivisorSet_Percentile
using TesterCpu = PerfectNumbers.Core.Cpu.MersenneNumberDivisorByDivisorCpuTesterWithForPercentileDivisorSetForCpuOrder;
using TesterHybrid = PerfectNumbers.Core.Cpu.MersenneNumberDivisorByDivisorCpuTesterWithForPercentileDivisorSetForHybridOrder;
using TesterGpu = PerfectNumbers.Core.Cpu.MersenneNumberDivisorByDivisorCpuTesterWithForPercentileDivisorSetForGpuOrder;
#elif DivisorSet_Additive
using TesterCpu = PerfectNumbers.Core.Cpu.MersenneNumberDivisorByDivisorCpuTesterWithForAdditiveDivisorSetForCpuOrder;
using TesterHybrid = PerfectNumbers.Core.Cpu.MersenneNumberDivisorByDivisorCpuTesterWithForAdditiveDivisorSetForHybridOrder;
using TesterGpu = PerfectNumbers.Core.Cpu.MersenneNumberDivisorByDivisorCpuTesterWithForAdditiveDivisorSetForGpuOrder;
#else
using TesterCpu = PerfectNumbers.Core.Cpu.MersenneNumberDivisorByDivisorCpuTesterWithForOneByOneDivisorSetForCpuOrder;
using TesterHybrid = PerfectNumbers.Core.Cpu.MersenneNumberDivisorByDivisorCpuTesterWithForOneByOneDivisorSetForHybridOrder;
using TesterGpu = PerfectNumbers.Core.Cpu.MersenneNumberDivisorByDivisorCpuTesterWithForOneByOneDivisorSetForGpuOrder;
using TesterCpu = PerfectNumbers.Core.Cpu.MersenneNumberDivisorByDivisorCpuTesterWithForSequentialDivisorSetForCpuOrder;
using TesterHybrid = PerfectNumbers.Core.Cpu.MersenneNumberDivisorByDivisorCpuTesterWithForSequentialDivisorSetForHybridOrder;
using TesterGpu = PerfectNumbers.Core.Cpu.MersenneNumberDivisorByDivisorCpuTesterWithForSequentialDivisorSetForGpuOrder;
#endif
namespace PerfectNumbers.Core.Cpu;
@@ -71,10 +79,14 @@ internal struct MersenneNumberDivisorByDivisorPrimeScanSessionWithTemplate
string extension = ".bin";
#if DivisorSet_Predictive
extension = ".predictive";
#elif DivisorSet_Percentile
extension = ".percentile";
#elif DivisorSet_Additive
extension = ".additive";
#elif DivisorSet_TopDown
extension = ".topdown";
#endif
string stateFile = Path.Combine(
PerfectNumberConstants.ByDivisorStateDirectory,
prime.ToString(CultureInfo.InvariantCulture) + extension);
string stateFile = prime.ToString(CultureInfo.InvariantCulture) + extension;
ConfigureForPrime(stateFile);
@@ -82,11 +94,6 @@ internal struct MersenneNumberDivisorByDivisorPrimeScanSessionWithTemplate
if (!isPrime)
{
if (!string.IsNullOrEmpty(stateFile) && File.Exists(stateFile))
{
File.Delete(stateFile);
}
_markComposite();
_printResult(prime, true, true, false, divisor);
Console.WriteLine($"Finished processing {prime}");
@@ -106,25 +113,39 @@ internal struct MersenneNumberDivisorByDivisorPrimeScanSessionWithTemplate
private void ConfigureForPrime(string stateFile)
{
#if DivisorSet_TopDown
BigInteger resumeK = EnvironmentConfiguration.MinK;
if (File.Exists(stateFile))
BigInteger lastK = BigInteger.Zero;
if (EnvironmentConfiguration.ByDivisorKStateRepository is not null)
{
if (MersenneNumberDivisorByDivisorTester.TryReadLastSavedK(stateFile, out BigInteger lastK))
if (ulong.TryParse(Path.GetFileNameWithoutExtension(stateFile), NumberStyles.None, CultureInfo.InvariantCulture, out ulong parsedPrime) &&
EnvironmentConfiguration.ByDivisorKStateRepository.TryGet(parsedPrime, out BigInteger storedK) &&
storedK > BigInteger.Zero)
{
resumeK = lastK + BigInteger.One;
_tester.ResumeFromState(stateFile, lastK, resumeK);
lastK = storedK;
}
else
{
_tester.ResumeFromState(stateFile, BigInteger.Zero, resumeK);
}
}
else
{
_tester.ResumeFromState(stateFile, BigInteger.Zero, resumeK);
}
_tester.ResumeFromState(stateFile, lastK, resumeK);
_tester.ResetStateTracking();
return;
#else
BigInteger resumeK = EnvironmentConfiguration.MinK;
BigInteger lastK = BigInteger.Zero;
if (EnvironmentConfiguration.ByDivisorKStateRepository is not null)
{
if (ulong.TryParse(Path.GetFileNameWithoutExtension(stateFile), NumberStyles.None, CultureInfo.InvariantCulture, out ulong parsedPrime) &&
EnvironmentConfiguration.ByDivisorKStateRepository.TryGet(parsedPrime, out BigInteger storedK) &&
storedK > BigInteger.Zero)
{
lastK = storedK;
resumeK = storedK + BigInteger.One;
}
}
_tester.ResumeFromState(stateFile, lastK, resumeK);
_tester.ResetStateTracking();
#endif
}
[MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]