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A323150
Numbers k such that 443*2^k+1 is prime.
0
1, 5, 9, 33, 45, 245, 401, 565, 289073, 291693, 1189865
OFFSET
1,2
MAPLE
select(k->isprime(443*2^k+1), [$1..1000]); # Muniru A Asiru, Jan 05 2019
MATHEMATICA
Select[Range[1000], PrimeQ[443*2^# + 1] &]
CROSSREFS
Sequence in context: A272447 A034435 A270454 * A116390 A028351 A211952
KEYWORD
nonn,more,hard
AUTHOR
Robert Price, Jan 05 2019
STATUS
approved