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Old 2012-11-05, 03:49   #8
CRGreathouse's Avatar
Aug 2006

3×1,993 Posts

Originally Posted by dabaichi View Post
By googling 58426759 and 73278467, I found this page. The OP, that is also Arxenar, posted a link. Following the link, you can figure out what the "Theorem 1379" is.
Ah -- that only numbers coprime to 10 (ending in 1, 3, 7, or 9) can be prime, presumably with the exception of 2 and 5. But that's grade-school level, pretty far below the mersenneforums assumed level of competence.
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