A309412 Numbers k such that (45^k + 1)/46 is prime.

103, 157, 37159

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[(45^p + 1)/46], Print[p]], {n, 1, 1000000}]

Prog

(PARI) is(n)=ispseudoprime((45^n+1)/46)

Crossrefs

Sequence in context: A106983 A328822 A141962 * A115267 A107217 A142942

Adjacent sequences: A309409 A309410 A309411 * A309413 A309414 A309415

Keyword

nonn,bref,hard,more

Author

Paul Bourdelais, Jul 29 2019

Status

approved