[seqfan] Re: 647089
olivier.gerard at gmail.com
Thu Nov 27 11:33:42 CET 2014
On Thu, Nov 27, 2014 at 10:45 AM, юрий герасимов <2stepan at rambler.ru> wrote:
> Dear SeqFans.
> MAGMA calculator can not find the second and subsequent values of
> composites k such that k*(k - 1) divides 2^(k - 1) - 1. Help
> 647089, ... What in the ne[t one?
> Best regards, JSG
I don't think your formula is correct
2^647088 - 1 is not divisible by 647088 so it cannot be divisible by
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