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Old 2015-05-19, 19:11   #3
Batalov
 
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Mar 2008
Phi(4,2^7658614+1)/2

22·3·7·109 Posts
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Also, A071580(22) and A071580(23) should be in the UTM prime database (even if they are not minimal, pending a double check, -- they are still great primes)!
Email Chris Caldwell and send him a zip of the whole sequence, because it will be a helper file for proving successive terms.
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