|Bill Allombert on Thu, 08 May 2014 22:18:47 +0200|
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|Re: Factoring small numbers|
On Thu, May 08, 2014 at 02:05:38PM -0400, Charles Greathouse wrote: > Are you sure it's not storing found factors? > > removeprimes(setintersect(addprimes(), factor(19180172397815991981)[,1]~)); > default(factor_add_primes,0) > for(i=1,1000,factor(19180172397815991981)) > ## > > I get 52 ms for the factorization, and I don't think my computer is 20 > times slower than yours. (2 or 3 times, maybe.) Are you using Windows ? pthread ? 32-bit ? Cheers, Bill.