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Old 2019-10-02, 20:45   #37
Batalov
 
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"Serge"
Mar 2008
Phi(4,2^7658614+1)/2

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Congrats! Nice sexy pair, 50539 digits!

Shorter written as:
(520461*2^55931+1)*(98569639289*(520461*2^55931-1)^2-3)-1
(520461*2^55931+1)*(98569639289*(520461*2^55931-1)^2-3)+5
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