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A185073 Numbers n such that (34^n - 1)/33 is prime. 1
13, 1493, 5851, 6379, 125101 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..5.

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

Cf. A028491, A004061, A004062, A004063, A004064, A004023, A005808, A016054, A006032, A006033, A006034, A006035, A098438, A127995-A128005.

Sequence in context: A242562 A201357 A220551 * A185193 A066457 A203515

Adjacent sequences:  A185070 A185071 A185072 * A185074 A185075 A185076

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

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Last modified December 7 22:29 EST 2019. Contains 329850 sequences. (Running on oeis4.)