Karim BELABAS on Wed, 15 Jan 2003 23:43:49 +0100 (MET) |
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Re: recent factorint() regression |
On Wed, 15 Jan 2003, Igor Schein wrote: > factorint(2300240759,3) > > gets stuck in an infinite loop. > > It was broken 5 days ago. By me. I have incorporated trial division in the prime testing algorithms, and catered for the small values. Two unrelated typos could affect the result for arguments around 2^32. I have fixed both. pari-2.1.5: (22:45) gp > t=0;forstep(x = 2^32-10^7+1,2^32,2, t += isprime(x)); t time = 2mn, 7,260 ms. %1 = 450525 Current CVS: time = 32,300 ms. %1 = 450525 Cheers, Karim. -- Karim Belabas Tel: (+33) (0)1 69 15 57 48 Dép. de Mathématiques, Bât. 425 Fax: (+33) (0)1 69 15 60 19 Université Paris-Sud Email: Karim.Belabas@math.u-psud.fr F-91405 Orsay (France) http://www.math.u-psud.fr/~belabas/ -- PARI/GP Home Page: http://www.parigp-home.de/