A141802 Numbers n such that 2*29^n + 1 is prime.

0, 1, 3, 5, 7, 23, 177, 327, 875, 6645, 26605

Offset

1,3

Comments

Primes found and proved by PrimeForm. No more terms up to 20000.

Links

Table of n, a(n) for n=1..11.

Prog

(PARI) is(n)=ispseudoprime(2*29^n+1) \\ Charles R Greathouse IV, Jun 06 2017

Crossrefs

Cf. A141798.

Sequence in context: A216124 A096505 A214680 * A029846 A108313 A045966

Adjacent sequences: A141799 A141800 A141801 * A141803 A141804 A141805

Keyword

nonn,more,hard

Author

Rick L. Shepherd, Jul 08 2008

Extensions

a(11) from Michael S. Branicky, Dec 14 2023

Status

approved