

A322951


Numbers k such that 319*2^k+1 is prime.


0



2, 10, 18, 274, 314, 522, 562, 578, 594, 602, 930, 1074, 23826, 184554, 1923378, 2248914, 2290722
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OFFSET

1,1


LINKS

Table of n, a(n) for n=1..17.
Ray Ballinger, Proth Search Page
Ray Ballinger and Wilfrid Keller, List of primes k.2^n + 1 for 300 < k < 600
Y. Gallot, Proth.exe: Windows Program for Finding Large Primes
Wilfrid Keller, List of primes k.2^n  1 for k < 300
Eric Weisstein's World of Mathematics, Proth Prime
Index entries for sequences of n such that k*2^n1 (or k*2^n+1) is prime


MAPLE

select(n>isprime(319*2^n+1), [$1..1000]); # Muniru A Asiru, Dec 31 2018


MATHEMATICA

Select[Range[1000], PrimeQ[319*2^# + 1] &] (* Robert Price, Dec 31 2018 *)


CROSSREFS

Cf. A002255, A050527.
Sequence in context: A346551 A180591 A330083 * A156446 A032685 A085936
Adjacent sequences: A322948 A322949 A322950 * A322952 A322953 A322954


KEYWORD

nonn,more,hard


AUTHOR

Robert Price, Dec 31 2018


EXTENSIONS

a(16)a(17) from Jeppe Stig Nielsen, Feb 25 2020


STATUS

approved



