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Old 2018-01-09, 12:00   #1
lukerichards
 
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"Luke Richards"
Jan 2018
Birmingham, UK

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Default A Mersenne number exercise

Hi,
I've seen the following statement in a paper but I don't have access to the reference given. Could someone maybe help me with a proof, please?

Quote:
If:
p is a prime > 2
Mp = 0 mod q
Then:
q = 1 mod p
and
q = +- mod 8
Not sure where to start?
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