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+--- Thread: HP 38G: Comparison of Factoring Efficiency of SQFO & Pollard's Rho (/thread-3547.html)
HP 38G: Comparison of Factoring Efficiency of SQFO & Pollard's Rho - Gerald H - 04-03-2015 12:57 PM
Pollard's Rho algorithm
http://www.hpmuseum.org/forum/thread-3540.html
& Shanks' Square Form algorithm
http://www.hpmuseum.org/forum/thread-3483.html
are two very different approaches to factorization.
For a set of 10 semi-prime numbers having factors varying from 3 to 6 digits the timing on the HP 38G was:
Pol-Rho SQFO
0.1758 0.0775 Mean
0.1965 0.1069 Sample StDev
0.0950 0.0262 Median
in units of 1 hour.
So until a better modulo squaring & GCD programme appears SQFO remains the fastest general factoring programme for the 38G.