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Old 2016-11-06, 18:46   #2
Batalov
 
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Mar 2008
Phi(4,2^7658614+1)/2

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Looks legit so far.

It's a pity they have no clue how to properly check for Fermat divisibility ("The Fermat divisor test will take a month and a half on a Haswell", they say)... but then again, does it matter? It most likely doesn't divide F, GF and even small xGFs.
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