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Old 2020-09-11, 23:00   #1
bhelmes
 
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Mar 2016

25·32 Posts
Default factors of Mersenne numbers

If f | Mp and p is prime then

a) f | 2n²-1

b) but not f=2n²-1


a) is clear for me but b) is a guess (I checked some numbers)


The first and fastest counterexample is welcome (Or a proof ?)


Greetings,

there must be somewhere a new Mersenne Prime
Bernhard
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