A309411 Numbers k such that (44^k + 1)/45 is prime.

2, 7, 41233

Offset

1,1

Comments

Larger terms correspond to probable primes.

Links

Table of n, a(n) for n=1..3.

P. Bourdelais, A Generalized Repunit Conjecture

Mathematica

Do[p=Prime[n]; If[PrimeQ[(44^p + 1)/45], Print[p]], {n, 1, 1000000}]

Prog

(PARI) is(n)=ispseudoprime((44^n+1)/45)

Crossrefs

Sequence in context: A226704 A224420 A106023 * A215438 A152181 A153089

Adjacent sequences: A309408 A309409 A309410 * A309412 A309413 A309414

Keyword

nonn,bref,hard,more

Author

Paul Bourdelais, Jul 29 2019

Status

approved