

A209120


Numbers n such that (33^n  1)/32 is prime.


1




OFFSET

1,1


LINKS

Table of n, a(n) for n=1..5.
H. Dubner, Generalized repunit primes, Math. Comp., 61 (1993), 927930.
H. Lifchitz, Mersenne and Fermat primes field
Index to primes in various ranges, form ((k+1)^n1)/k


MATHEMATICA

Select[Prime[Range[100]], PrimeQ[(33^#1)/32]&]


PROG

(PARI) isok(n) = isprime((33^n1)/32); \\ Michel Marcus, Mar 13 2016


CROSSREFS

Sequence in context: A101382 A000724 A309749 * A256407 A256406 A157565
Adjacent sequences: A209117 A209118 A209119 * A209121 A209122 A209123


KEYWORD

hard,more,nonn


AUTHOR

Robert Price, Mar 05 2012


EXTENSIONS

a(5) corresponds to a probable prime discovered by Paul Bourdelais, Dec 31 2018


STATUS

approved



