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 A288715 Primes of the form k!8+1, where k!8 is the octuple factorial number (A114800). 1
 2, 3, 5, 7, 26881, 55441, 96909121, 132843110401, 48704929136641, 152349556104345601, 1397121162877440001, 383414179456168545484801, 81419177249980419349301811609600001, 13189906714496827934586893480755200001 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Robert Price, Table of n, a(n) for n = 1..21 Henri& Renaud Lifchitz, PRP Records.Search for n!8+1. Joe McLean, Interesting Sources of Probable Primes OpenPFGW Project, Primality Tester MATHEMATICA MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]]; Select[Table[MultiFactorial[i, 8] + 1, {i, 0, 100}], PrimeQ[#]&] CROSSREFS Cf. A204661. Sequence in context: A252357 A037948 A007659 * A208361 A145380 A136740 Adjacent sequences:  A288712 A288713 A288714 * A288716 A288717 A288718 KEYWORD nonn AUTHOR Robert Price, Jun 13 2017 STATUS approved

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Last modified December 7 20:40 EST 2021. Contains 349589 sequences. (Running on oeis4.)