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A006033
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Numbers n such that (15^n - 1)/14 is prime.
(Formerly M3150)
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16
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OFFSET
| 1,1
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COMMENTS
| 8741 and 37441 are only probable primes. - Julien Peter Benney (jpbenney(AT)ftml.net), Apr 27 2007
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REFERENCES
| H. Dubner, Generalized repunit primes, Math. Comp., 61 (1993), 927-930.
Ribenboim, Paulo; "The Book Of Prime Number Records"; published 1989 by Springer-Verlag; pages 350-354.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
| H. Lifchitz, Mersenne and Fermat primes field
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EXAMPLE
| (15^3-1)/14 = 241, which is prime.
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MATHEMATICA
| lst={}; Do[If[PrimeQ[(15^n-1)/14], Print[n]; AppendTo[lst, n]], {n, 10^5}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Aug 21 2008]
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PROG
| (Other) PFGW v3.3.1 [From Paul Bourdelais (pbourdelais(AT)radiantblue.com), Mar 15 2010]
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CROSSREFS
| Cf. A083402, A058808, A059802, A002551, A062647, A003525.
Sequence in context: A059802 A139854 A194578 * A142184 A199348 A002551
Adjacent sequences: A006030 A006031 A006032 * A006034 A006035 A006036
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
| One more term from Julien Peter Benney (jpbenney(AT)ftml.net), Apr 27 2007
a(8)=89009 is a probable prime discovered by Paul Bourdelais (pbourdelais(AT)radiantblue.com), Mar 15 2010
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