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A323001
Numbers k such that 353*2^k+1 is prime.
0
21, 369, 143841, 286149
OFFSET
1,1
MATHEMATICA
Select[Range[1000], PrimeQ[353*2^# + 1] &] (* Robert Price, Jan 01 2019 *)
CROSSREFS
Sequence in context: A108495 A178351 A324360 * A152182 A036904 A218763
KEYWORD
nonn,more,hard
AUTHOR
Robert Price, Jan 01 2019
STATUS
approved