A290122 Primes of the form k!/9 - 1.

79, 145297151999, 39520825343999, 711374856191999, 5676771352412159999, 1209874383379816906751999999, 982417999304411328282623999999, 29472539979132339848478719999999, 1529305899025149449590664397953433599999999

Offset: 1

Author

Robert Price, Jul 19 2017

Keywords

• nonn

Links

• Robert Price, Table of n, a(n) for n = 1..12
• Joe McLean, Interesting Sources of Probable Primes.
• OpenPFGW Project, Primality Tester.

Crossrefs

Cf. A139184, A139204, A290116, A290117, A290118, A290119, A290120, A290121, A290123.

Programs

Mathematica

Select[Table[k! / 9 - 1, {k, 6, 100}], PrimeQ[#]&]

Formula

a(n) = A139184(A139204(n)). - Elmo R. Oliveira, Apr 16 2025

Extensions

Missing terms inserted by Alois P. Heinz, Dec 05 2024