A309532 Numbers k such that (121^k + 1)/122 is prime.

5, 13, 97, 1499, 11321, 320483

Offset

1,1

Comments

The corresponding primes are terms of A059055. - Bernard Schott, Aug 09 2019

Links

Table of n, a(n) for n=1..6.

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

Adjacent sequences: A309529 A309530 A309531 * A309533 A309534 A309535

Keyword

nonn,more

Author

Paul Bourdelais, Aug 06 2019

Status

approved