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Jun 24, 2013 at 0:49 comment added Todd Trimble Not research level, but also probably not homework. Please do not delete; there is information in the answer and in the comments which could be useful for mathematicians.
Jun 19, 2013 at 21:40 history closed user6976
Felipe Voloch
Peter Mueller
Charles
user10534
too localized
Jun 19, 2013 at 19:35 vote accept Milena
Jun 19, 2013 at 18:31 answer added Mikhail Katz timeline score: 1
Jun 19, 2013 at 18:31 comment added user6976 Voted to close.
Jun 19, 2013 at 18:18 comment added Gerhard Paseman Start by investigating the case that n is prime, and look at factors of a^n - 1. When you handle that, try n a prime power. Gerhard "Eventually, Look Up Zsigmondy's Theorem" Paseman, 2013.06.19
Jun 19, 2013 at 18:16 comment added user6976 Is this a homework problem?
Jun 19, 2013 at 18:11 history asked Milena CC BY-SA 3.0