Windows Factoring Benchmarks
(64bit & 32bit on Core2)
by Jeff Gilchrist
Last Updated: March 23, 2010
This page has benchmark results for various Factoring software that I have compiled from source for Windows in 64bit and 32bit using Visual Studio 2008. To get the binaries, see the
The following benchmarks were performed on an Intel Core 2 Quad Q9550 overclocked to 3.4GHz with 4GB RAM running Windows 7 Professional 64bit.
C85 = 1877138824359859508015524119652506869600959721781289179190693027302028679377371001561
C80 = 43756152090407155008788902702412144383525640641502974083054213255054353547943661
C75 = 281396163585532137380297959872159569353696836686080935550459706878100362721
GCC = Compiled using
GNU Compiler Collection
MSVC = Compiled using
Microsoft Visual C++
Self-Initializing Quadratic Sieve (SIQS)
Elliptic Curve Method (ECM)
Elliptic Curve Method (ECM), P-1, P+1
Self-Initializing Quadratic Sieve (SIQS) and Number Field Sieve (GNFS/SNFS)
Quadratic Sieves (SIQS/MPQS/QS)
Elliptic Curve Method (ECM), P-1, P+1,
Squfof, Rho, and Fast Sieve of Eratosthenes
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