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A059614
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Numbers k such that 6^k - 5 is prime.
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8
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2, 3, 4, 29, 31, 34, 53, 65, 94, 202, 288, 415, 457, 483, 703, 762, 1285, 1464, 2094, 3384, 9335, 15955, 18910, 73119, 125418, 143273, 584279
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OFFSET
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1,1
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COMMENTS
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The next term in the sequence is greater than 12400. - Dmitry Kamenetsky, Oct 02 2008
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LINKS
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Table of n, a(n) for n=1..27.
Henri Lifchitz and Renaud Lifchitz, PRP Records.
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EXAMPLE
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65 is present because 6^65 - 5 is prime.
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PROG
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(PARI) is(n)=ispseudoprime(6^n-5) \\ Charles R Greathouse IV, Feb 20 2017
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CROSSREFS
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Sequence in context: A274677 A100604 A062931 * A333074 A241974 A226055
Adjacent sequences: A059611 A059612 A059613 * A059615 A059616 A059617
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KEYWORD
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nonn
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AUTHOR
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Andrey V. Kulsha, Feb 09 2001
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EXTENSIONS
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a(21), corresponding to a probable prime, from Dmitry Kamenetsky, Oct 02 2008
a(22)-a(23) from Henri Lifchitz
a(24)-a(25) from Lelio R. Paula
a(26) from Paul Bourdelais, Jan 28 2021
a(27) from Paul Bourdelais, Feb 26 2021
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STATUS
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approved
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