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A215535
Numbers k such that 36^k - 35^k is prime.
0
2, 5, 7, 23, 45737
OFFSET
1,1
COMMENTS
The number k has to be a prime.
a(6) > 10^5. - Robert Price, Oct 08 2012
MATHEMATICA
Select[Prime[Range[PrimePi[1000]]], PrimeQ[36^# - 35^#] &] (* T. D. Noe, Aug 15 2012 *)
PROG
(PARI) is(n)=ispseudoprime(36^n-35^n) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
Sequence in context: A182474 A106018 A188499 * A056921 A041245 A042159
KEYWORD
nonn,hard
AUTHOR
Jean-Louis Charton, Aug 15 2012
EXTENSIONS
a(5) from Robert Price, Oct 08 2012
STATUS
approved