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A032491
Numbers k such that 229*2^k+1 is prime.
0
6, 82, 186, 334, 690, 838, 1146, 1482, 2262, 5118, 5398, 6294, 9322, 15270, 15930, 28134, 34926, 47878, 52986, 217234, 370086, 484018, 786034, 1118806, 1818078, 1956294
OFFSET
1,1
MATHEMATICA
Select[Range[1000], PrimeQ[229*2^# + 1] & ] (* Robert Price, Dec 19 2018 *)
PROG
(PARI) is(n)=ispseudoprime(229*2^n+1) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
Sequence in context: A121790 A279203 A320993 * A135624 A222197 A089397
KEYWORD
nonn,hard,more
AUTHOR
EXTENSIONS
a(20)-a(26) from the Ray Ballinger and Wilfrid Keller link by Robert Price, Dec 19 2018
STATUS
approved