[seqfan] Re: ^2 + 2^

2stepan at rambler.ru 2stepan at rambler.ru
Mon Feb 22 19:17:39 CET 2016


Dear SeqFans: primes p such that p^2 + 2^(2^k) is not prime for all k: 2, 23, 43,
53, 83, 107, 113, 127, 157, 173, 197, 223, 227, 257, 263, 283, 337, 353, 367,
383, 397,433,443, 457, 467,523, 557, 563, 587,617, 643, 647, 653, 673, 683,727,
733, 757, 773, 797, 857, 863, 877, 887, 907, 937, 947, 977, 1013, 1033, 1063,
1097, ...
This sequence is correct? Best, JSG



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