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

5, 13, 97, 1499, 11321, 320483

Offset: 1

Author

Paul Bourdelais, Aug 06 2019

Keywords

• nonn
• more

Comments

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

Crossrefs

Cf. A059055.

Programs

Mathematica

Do[p=Prime[n]; If[PrimeQ[(121^p + 1)/122], Print[p]], {n, 1, 1000000}]

PARI

is(n)=ispseudoprime((121^n+1)/122)