Robert, Thanks for setting me straight on True vs 1. I still wonder though about the first part of my question. Why does pari(7).isprime() work just fine in the notebook, but not from the Sage command line? Thank you for being patient...Dave
On Nov 2, 3:48 pm, Robert Bradshaw <rober...@math.washington.edu> wrote: > On Nov 2, 2009, at 3:22 PM, davedo2 wrote: > > > > > OK, I downloaded Sage 4.2 and -testall seemed OK. However, I have a > > question: if I evaluate pari(7).isprime() in the notebook it returns > > True, but if I try it from the Sage command line it spawns a longish > > list of errors - what's up with that? > > > Also, is there a way to invoke it such that it returns 1 or 0 instead > > of True or False? Thanks...Dave > > How about > > sage: int(pari(7).isprime()) > 1 > > Though I don't know what the advantage to return 1 or 0 would be. Note > that > > sage: sum(is_prime(n) for n in range(100)) > 25 > > works just fine. > > BTW, you don't have to invoke pari explicitly here, it's faster to do > > sage: is_prime(7) > True > sage: int(is_prime(7)) > 1 > > - Robert --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
