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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EvenPerfectBitScanner/CliArguments.cs
+32 -18
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@@ -5,6 +5,16 @@ using PerfectNumbers.Core.Gpu;
namespace EvenPerfectBitScanner;
internal enum ByDivisorKIncrementMode
{
Sequential,
Pow2Groups,
Predictive,
Percentile,
Additive,
TopDown,
}
internal readonly struct CliArguments
{
private const string DefaultCyclesPath = "divisor_cycles.bin";
@@ -25,8 +35,7 @@ namespace EvenPerfectBitScanner;
internal readonly bool UseResidue;
internal readonly bool UseDivisor;
internal readonly bool UseByDivisor;
internal readonly bool UseDivisorPow2Increment;
internal readonly bool UseDivisorPredictiveIncrement;
internal readonly ByDivisorKIncrementMode ByDivisorKIncrementMode;
internal readonly int ByDivisorSpecialRange;
internal readonly bool UseGcdFilter;
internal readonly bool TestMode;
@@ -76,8 +85,7 @@ namespace EvenPerfectBitScanner;
bool useDivisor,
bool useByDivisor,
bool useGcdFilter,
bool useDivisorPow2Increment,
bool useDivisorPredictiveIncrement,
ByDivisorKIncrementMode byDivisorKIncrementMode,
int byDivisorSpecialRange,
bool testMode,
bool useGpuCycles,
@@ -124,8 +132,7 @@ namespace EvenPerfectBitScanner;
UseResidue = useResidue;
UseDivisor = useDivisor;
UseByDivisor = useByDivisor;
UseDivisorPow2Increment = useDivisorPow2Increment;
UseDivisorPredictiveIncrement = useDivisorPredictiveIncrement;
ByDivisorKIncrementMode = byDivisorKIncrementMode;
ByDivisorSpecialRange = byDivisorSpecialRange;
UseGcdFilter = useGcdFilter;
TestMode = testMode;
@@ -178,8 +185,7 @@ namespace EvenPerfectBitScanner;
bool useResidue = false;
bool useDivisor = false;
bool useByDivisor = false;
bool useDivisorPow2Increment = false;
bool useDivisorPredictiveIncrement = false;
ByDivisorKIncrementMode byDivisorKIncrementMode = ByDivisorKIncrementMode.Sequential;
int byDivisorSpecialRange = 0;
bool useGcdFilter = false;
bool testMode = false;
@@ -314,22 +320,31 @@ namespace EvenPerfectBitScanner;
string value = argument["--bydivisor-k-increment=".Length..].Trim();
if (value.Equals("pow2groups", StringComparison.OrdinalIgnoreCase))
{
useDivisorPow2Increment = true;
useDivisorPredictiveIncrement = false;
byDivisorKIncrementMode = ByDivisorKIncrementMode.Pow2Groups;
}
else if (value.Equals("sequential", StringComparison.OrdinalIgnoreCase))
{
useDivisorPow2Increment = false;
useDivisorPredictiveIncrement = false;
byDivisorKIncrementMode = ByDivisorKIncrementMode.Sequential;
}
else if (value.Equals("predictive", StringComparison.OrdinalIgnoreCase))
{
useDivisorPow2Increment = false;
useDivisorPredictiveIncrement = true;
byDivisorKIncrementMode = ByDivisorKIncrementMode.Predictive;
}
else if (value.Equals("percentile", StringComparison.OrdinalIgnoreCase))
{
byDivisorKIncrementMode = ByDivisorKIncrementMode.Percentile;
}
else if (value.Equals("additive", StringComparison.OrdinalIgnoreCase))
{
byDivisorKIncrementMode = ByDivisorKIncrementMode.Additive;
}
else if (value.Equals("topdown", StringComparison.OrdinalIgnoreCase))
{
byDivisorKIncrementMode = ByDivisorKIncrementMode.TopDown;
}
else
{
Console.WriteLine("Invalid value for --bydivisor-k-increment. Use sequential, pow2groups, or predictive.");
Console.WriteLine("Invalid value for --bydivisor-k-increment. Use sequential, pow2groups, predictive, percentile, additive, or topdown.");
return default;
}
@@ -652,8 +667,7 @@ namespace EvenPerfectBitScanner;
useDivisor,
useByDivisor,
useGcdFilter,
useDivisorPow2Increment,
useDivisorPredictiveIncrement,
byDivisorKIncrementMode,
byDivisorSpecialRange,
testMode,
useGpuCycles,
@@ -696,7 +710,7 @@ namespace EvenPerfectBitScanner;
Console.WriteLine(" --increment=bit|add exponent increment method (default add)");
Console.WriteLine(" --threads=<value> number of worker threads");
Console.WriteLine(" --mersenne=pow2mod|incremental|lucas|residue|divisor|bydivisor Mersenne test method");
Console.WriteLine(" --bydivisor-k-increment=sequential|pow2groups|predictive k iteration strategy for --mersenne=bydivisor (default sequential)");
Console.WriteLine(" --bydivisor-k-increment=sequential|pow2groups|predictive|percentile|additive|topdown k iteration strategy for --mersenne=bydivisor (default sequential)");
Console.WriteLine(" --bydivisor-special-range=<n> widen pow2groups special values to +/- n percent (default 0 = points)");
Console.WriteLine(" --max-k=<value> max k for Mersenne tests (q = 2*p*k + 1), including --mersenne=bydivisor");
Console.WriteLine(" --mersenne-device=cpu|gpu|hybrid Device for Mersenne method (default gpu)");