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Search: id:A079907
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| A079907 |
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Numbers n such that 11*12^n -1 is prime. |
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+0
10
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| 1, 2, 21, 25, 33, 54, 78, 235, 1566, 2273, 2310, 4121
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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R. K. Guy, Unsolved Problems in Theory of Numbers, Section A3.
H. C. Williams, The primality of certain integers of the form 2Ar^n - 1, Acta Arith. 39 (1981), 7-17.
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LINKS
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Steven Harvey, Williams Primes
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MATHEMATICA
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Do[ If[ PrimeQ[11*12^n - 1], Print[n]], {n, 1, 2000}]
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PROGRAM
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(PARI.2.0.17) for(n=1, 2000, if(isprime(11*12^n-1), print(n)))
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CROSSREFS
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Cf. A003307, A002235, A046865, A079906, A046866, A001771, A005541, A056725, A046867.
Sequence in context: A041513 A135053 A042565 this_sequence A075715 A071761 A101316
Adjacent sequences: A079904 A079905 A079906 this_sequence A079908 A079909 A079910
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KEYWORD
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nonn,hard
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Jan 16 2003
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EXTENSIONS
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More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 05 2008
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