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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
H. Dubner, Generalized repunit primes, Math. Comp., 61 (1993), 927-930.
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
Sequence in context: A242562 A201357 A220551 * A185193 A066457 A203515
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 July 19 02:27 EDT 2024. Contains 374388 sequences. (Running on oeis4.)