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A322958
Numbers k such that 331*2^k+1 is prime.
0
4, 8, 12, 20, 28, 36, 120, 184, 200, 756, 788, 1304, 6412, 7848, 12944, 40116, 45056, 67520, 129172, 204592, 225568, 615116, 803668, 1646668, 2917844
OFFSET
1,1
MAPLE
select(n->isprime(331*2^n+1), [$1..1000]); # Muniru A Asiru, Dec 31 2018
MATHEMATICA
Select[Range[1000], PrimeQ[331*2^# + 1] &] (* Robert Price, Dec 31 2018 *)
CROSSREFS
Sequence in context: A311662 A311663 A333572 * A123723 A279227 A261649
KEYWORD
nonn,more,hard,changed
AUTHOR
Robert Price, Dec 31 2018
EXTENSIONS
a(25) from Jeppe Stig Nielsen, Dec 20 2024
STATUS
approved