On Sun, Jan 24, 2010 at 1:48 AM, Robert Bradshaw <rober...@math.washington.edu> wrote: > On Jan 23, 2010, at 9:43 PM, Dr. David Kirkby wrote: > >> Nick Alexander wrote: >>>> >>>> IMHO, that is far too trivial. Most 14 year old school child will know >>>> what that is. >>> >>> You say that like it is a Bad Thing. >> >> Well it is if you want to stop a spammer. They want to edit the page, so >> they answer such a simple question, and away they go. How is knowing the >> next prime after 7 any more difficult than knowing the name of some maths >> software which uses python? > > It's enough to stop a script--especially if we changed it ever several > month. I think we'll discourage valid users before we're able to discourage > all spammers. > > What about the next prime after 10**9? Anyone using Sage could answer this > one--we could even ask it as "next_prime(10^9)." > > - Robert
Hi, I don't know if this will make everybody happy, but I changed the question to something similar, but with a shorter answer: "How many prime numbers are less than 100? Hint: In Sage, compute prime_pi(100)" The answer is only two digits, which is nice and short to type. William -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
