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Old 2014-05-12, 21:17   #2
Batalov
 
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Mar 2008
Phi(4,2^7658614+1)/2

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Question

There are a few existing reservations that make one very curious:
222748^3+3^222748 (a 106278 decimal digits PRP by Anatoly Selevich) is reserved by Jens Franke.
Is it that the low value of y=3 makes for a very special case for a ECPP proof?
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