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A053360
Numbers k such that 287*2^k + 1 is a prime.
0
3, 27, 59, 291, 699, 1259, 1771, 3051, 19379, 23323, 41459, 121747, 206539, 515827
OFFSET
1,1
MATHEMATICA
Select[Range[5*10^3], PrimeQ[287*2^# + 1] &] (* G. C. Greubel, May 25 2018 *)
PROG
(PARI) is(n)=ispseudoprime(287*2^n+1) \\ G. C. Greubel, May 25 2018
(Magma) [n: n in [1..300] | IsPrime(287*2^n+1)]; // G. C. Greubel, May 25 2018
CROSSREFS
Sequence in context: A071183 A025414 A201276 * A176963 A376295 A204046
KEYWORD
hard,nonn,more
AUTHOR
N. J. A. Sloane, Dec 29 1999
EXTENSIONS
a(12)-a(14) from the Ray Ballinger and Wilfrid Keller link by Robert Price, Dec 22 2018
STATUS
approved