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A309532
Numbers k such that (121^k + 1)/122 is prime.
3
5, 13, 97, 1499, 11321, 320483
OFFSET
1,1
COMMENTS
The corresponding primes are terms of A059055. - Bernard Schott, Aug 09 2019
MATHEMATICA
Do[p=Prime[n]; If[PrimeQ[(121^p + 1)/122], Print[p]], {n, 1, 1000000}]
PROG
(PARI) is(n)=ispseudoprime((121^n+1)/122)
CROSSREFS
Cf. A059055.
Sequence in context: A304663 A306167 A107171 * A123646 A123622 A337749
KEYWORD
nonn,more
AUTHOR
Paul Bourdelais, Aug 06 2019
STATUS
approved