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A138050
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Numbers n such that 23^n + 2 is prime.
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5
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OFFSET
| 1,2
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COMMENTS
| No further terms < 100000. - Ray Chandler (rayjchandler(AT)sbcglobal.net), Aug 03 2011
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LINKS
| Henri & Renaud Lifchitz, PRP Records.
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MATHEMATICA
| Do[ f = 23^n + 2; If[ PrimeQ[ f ], Print[ {n, f} ] ], {n, 1, 323} ]
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CROSSREFS
| Cf. A051783 = Numbers n such that 3^n + 2 is prime. Cf. A087885 = Numbers n such that 5^n + 2 is prime. Cf. A090649, A109076, A113480, A138048, A138049, A138051, A087886, A113481.
Sequence in context: A163634 A173373 A127867 * A183940 A077568 A122014
Adjacent sequences: A138047 A138048 A138049 * A138051 A138052 A138053
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KEYWORD
| nonn,more
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AUTHOR
| Alexander Adamchuk (alex(AT)kolmogorov.com), Mar 02 2008
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EXTENSIONS
| {12415,14655,27679} from Ray Chandler (rayjchandler(AT)sbcglobal.net), Aug 01 2011
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