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Old 2016-05-23, 00:40  
Batalov
 
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"Serge"
Mar 2008
Phi(4,2^7658614+1)/2

22×2,333 Posts
Cool

And now, a Kynea prime for b=30, to make a nice pair.
(30157950 + 1)2 - 2 is prime
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