mlemanczyk/even-perfect-numbers-scanner
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Restore pre-residue mode behavior and tests

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Marek Lemańczyk committed 2025-09-21 04:05:16 +02:00
1 parent 23e8d306b1
commit aa683215b2
8 files changed
+51 -678
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EvenPerfectBitScanner/Program.cs
+21 -27
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@@ -74,15 +74,12 @@ internal static class Program
bool mersenneOnGpu = true; // controls Lucas/incremental/pow2mod device
bool orderOnGpu = true; // controls order computations device
int scanBatchSize = 2_097_152, sliceSize = 32;
UInt128 residueKMax = 5_000_000UL;
bool residueKMaxExplicit = false;
string filterFile = string.Empty;
string cyclesPath = DefaultCyclesPath;
int cyclesBatchSize = 512;
bool continueCyclesGeneration = false;
UInt128 divisorCyclesSearchLimit128 = PerfectNumberConstants.ExtraDivisorCycleSearchLimit;
ulong divisorCyclesSearchLimit = PerfectNumberConstants.ExtraDivisorCycleSearchLimit;
bool divisorCyclesLimitExplicit = false;
ulong residueKMax = 5_000_000UL;
string filterFile = string.Empty;
string cyclesPath = DefaultCyclesPath;
int cyclesBatchSize = 512;
bool continueCyclesGeneration = false;
ulong divisorCyclesSearchLimit = PerfectNumberConstants.ExtraDivisorCycleSearchLimit;
// NTT backend selection (GPU): reference vs staged
for (int i = 0; i < args.Length; i++)
@@ -144,24 +141,21 @@ internal static class Program
int eq = arg.IndexOf('=');
divisor = UInt128.Parse(arg.AsSpan(eq + 1));
}
else if (arg.StartsWith("--divisor-cycles-limit=", StringComparison.OrdinalIgnoreCase))
{
int eq = arg.IndexOf('=');
if (UInt128.TryParse(arg.AsSpan(eq + 1), NumberStyles.Integer, provider: null, out var limit))
{
divisorCyclesSearchLimit128 = limit;
divisorCyclesSearchLimit = limit > (UInt128)ulong.MaxValue ? ulong.MaxValue : (ulong)limit;
divisorCyclesLimitExplicit = true;
}
}
else if (arg.StartsWith("--residue-max-k=", StringComparison.OrdinalIgnoreCase))
{
int eq = arg.IndexOf('=');
if (UInt128.TryParse(arg.AsSpan(eq + 1), NumberStyles.Integer, provider: null, out var kmax))
{
residueKMax = kmax;
residueKMaxExplicit = true;
}
else if (arg.StartsWith("--divisor-cycles-limit=", StringComparison.OrdinalIgnoreCase))
{
int eq = arg.IndexOf('=');
if (ulong.TryParse(arg.AsSpan(eq + 1), out var limit))
{
divisorCyclesSearchLimit = limit;
}
}
else if (arg.StartsWith("--residue-max-k=", StringComparison.OrdinalIgnoreCase))
{
int eq = arg.IndexOf('=');
if (ulong.TryParse(arg.AsSpan(eq + 1), out var kmax))
{
residueKMax = kmax;
}
}
// Replaces --lucas=cpu|gpu; controls device for Lucas and for
// incremental/pow2mod scanning