A370557 Numbers k such that A362555(k) = (5^k + 5*k)/5 is prime.

1, 2, 1014, 16058

Offset

1,2

Comments

If it exists, a(5) > 50000.

Links

Table of n, a(n) for n=1..4.

Prog

(PARI) is(n) = ispseudoprime(5^(n-1)+n)

Crossrefs

Cf. A104745, A362555, A370190.

Sequence in context: A271527 A214543 A258661 * A024033 A255569 A354534

Adjacent sequences: A370554 A370555 A370556 * A370558 A370559 A370560

Keyword

nonn,hard,more

Author

Hugo Pfoertner, Feb 24 2024

Status

approved