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A104072
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Primes of the form 2^n+5^2.
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1
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29, 41, 89, 281, 1049, 1048601, 4194329, 17179869209, 1180591620717411303449, 4951760157141521099596496921, 5192296858534827628530496329220121, 332306998946228968225951765070086169
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Primes of the form 4^n+4!+1 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 13 2010]
Indeed, calculating mod 3 we have 2^n+5^2 = (-1)^n+1 = 0 if n is odd, so n must be even to yield a prime. - M. F. Hasler, Nov 13 2010
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MATHEMATICA
| a = Delete[Union[Flatten[Table[If [PrimeQ[2^n + 25] == True, 2^n + 25, 0], {n, 1, 400}]]], 1]
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CROSSREFS
| Sequence in context: A137226 A057539 A157257 * A070268 A139870 A173874
Adjacent sequences: A104069 A104070 A104071 * A104073 A104074 A104075
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KEYWORD
| nonn
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AUTHOR
| Roger Lee Bagula (rlbagulatftn(AT)yahoo.com), Mar 02 2005
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