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A057177
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Numbers n such that (11^n + 1)/12 is a prime.
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15
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OFFSET
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1,1
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LINKS
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J. Brillhart et al., Factorizations of b^n +- 1, Contemporary Mathematics, Vol. 22, Amer. Math. Soc., Providence, RI, 3rd edition, 2002.
Eric Weisstein's World of Mathematics, Repunit
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MATHEMATICA
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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a(8) corresponds to a probable prime discovered by Paul Bourdelais, Feb 12 2010
a(9) corresponds to a probable prime discovered by Paul Bourdelais, Sep 30 2013
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STATUS
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approved
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