OFFSET
1,1
LINKS
H. Dubner, Generalized repunit primes, Math. Comp., 61 (1993), 927-930.
H. Lifchitz, Mersenne and Fermat primes field
P. Bourdelais, A Generalized Repunit Conjecture
MATHEMATICA
Select[Prime[Range[100]], PrimeQ[(34^#-1)/33]&]
PROG
(PARI) isok(n) = isprime((34^n-1)/33); \\ Michel Marcus, Mar 13 2016
(PARI) lista(nn) = for(n=1, nn, if(ispseudoprime((34^n - 1)/33), print1(n, ", "))); \\ Altug Alkan, Mar 13 2016
CROSSREFS
KEYWORD
hard,more,nonn
AUTHOR
Robert Price, Mar 10 2012
EXTENSIONS
a(5)=125101 corresponds to a probable prime discovered by Paul Bourdelais, Nov 20 2017
STATUS
approved