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A139064
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Primes of the form (7+k!)/7.
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43
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5702401, 186810624001, 2988969984001, 2215887149047283712000001, 1476163995198020704238093048217600000001, 19811874077955690819705574245769915192271839538955347505831613562880000000000001
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Numbers k for which (7+k!)/7 is prime see A139065
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MATHEMATICA
| a = {}; Do[If[PrimeQ[(n! + 7)/7], AppendTo[a, (n! + 7)/7]], {n, 1, 50}]; a
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PROG
| (PARI) for(k=7, 1e3, if(ispseudoprime(t=k!/7+1), print1(t", "))) \\ Charles R Greathouse IV, Jul 15 2011
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CROSSREFS
| Cf. A082672, A089085, A089130, A117141, A007749, A139056, A139057, A139058, A139059, A139060, A139061, A139061, A139062, A139063, A139064, A139065, A139066, A020458.
Sequence in context: A057882 A114685 A205045 * A151655 A151699 A038828
Adjacent sequences: A139061 A139062 A139063 * A139065 A139066 A139067
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KEYWORD
| nonn
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AUTHOR
| Artur Jasinski (grafix(AT)csl.pl), Apr 07 2008
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