A290118 Primes of the form k! / 5 - 1.

23, 7983359, 95800319, 4184557977599, 74398665357980243493599889630167039999999, 6690505322632761421634012410688150333030399999999, 281001223550575979708628521248902313987276799999999, 51724648302233636128592871030722395993839526477823999999999

Offset

1,1

Links

Robert Price, Table of n, a(n) for n = 1..8

Joe McLean, Interesting Sources of Probable Primes

OpenPFGW Project, Primality Tester

Mathematica

Select[Table[k! / 5 - 1, {k, 5, 100}], PrimeQ[#]&]

Crossrefs

Cf. A139175, A139200.

Sequence in context: A050234 A124993 A013818 * A087527 A013906 A214360

Adjacent sequences: A290115 A290116 A290117 * A290119 A290120 A290121

Keyword

nonn

Author

Robert Price, Jul 19 2017

Status

approved