

A322954


Numbers k such that 323*2^k+1 is prime.


0



1, 5, 145, 329, 381, 465, 3121, 4201, 4309, 12669, 13601, 17221, 33601, 41741, 46921, 65745, 80269, 384685, 1072285
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OFFSET

1,2


LINKS

Table of n, a(n) for n=1..19.
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(323*2^n+1), [$1..1000]); # Muniru A Asiru, Dec 31 2018


MATHEMATICA

Select[Range[1000], PrimeQ[323*2^# + 1] &] (* Robert Price, Dec 31 2018 *)


CROSSREFS

Cf. A002255, A050527.
Sequence in context: A168041 A081322 A232986 * A254711 A273920 A076218
Adjacent sequences: A322951 A322952 A322953 * A322955 A322956 A322957


KEYWORD

nonn,more,hard


AUTHOR

Robert Price, Dec 31 2018


STATUS

approved



