John Nicol on Thu, 27 Jan 2005 19:42:11 +0100 |
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Pari/GP 2-2-9.exe bug report |
Hi there, I noticed the following behavior(s) which seem buggy to me. This is Pari-GP 2-2-9.exe. I am running Windows XP Professional with 1GB of memory. #1: Factoring above and beyond 2^122 seems to encounter problems. (10:18) gp > factor(2^122 -1) *** factor: tempfile /tmp/FREL.400.3056 already exists. #2: contfrac(sqrt(x)) and contfrac(sqrt(x),n) terminate earlier than I would expect from definition. Rounding error? This is a quadratic surd, with infinitely many terms and period 2. Here I'm expecting arbitrarily many terms, but I only get 31. (10:30) gp > contfrac(sqrt(15)) %22 = [3, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 7] (10:30) gp > contfrac(sqrt(15),,300) %23 = [3, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 7] Thanks much! John -- ___________________________________________________________ Sign-up for Ads Free at Mail.com http://promo.mail.com/adsfreejump.htm