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A322945
Numbers k such that 307*2^k+1 is prime.
0
2, 8, 16, 26, 34, 112, 182, 226, 304, 782, 6886, 36422, 647786, 1289306, 2862962
OFFSET
1,1
MATHEMATICA
Select[Range[1000], PrimeQ[307*2^# + 1] &] (* Robert Price, Dec 31 2018 *)
CROSSREFS
Sequence in context: A125259 A169925 A225289 * A157512 A252594 A137882
KEYWORD
nonn,more,hard
AUTHOR
Robert Price, Dec 31 2018
EXTENSIONS
a(15) from Jeppe Stig Nielsen, May 30 2020
STATUS
approved