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%I #6 Dec 31 2018 20:24:32
%S 1,5,145,329,381,465,3121,4201,4309,12669,13601,17221,33601,41741,
%T 46921,65745,80269,384685,1072285
%N Numbers k such that 323*2^k+1 is prime.
%H Ray Ballinger, <a href="http://www.prothsearch.com/index.html">Proth Search Page</a>
%H Ray Ballinger and Wilfrid Keller, <a href="http://www.prothsearch.com/riesel1a.html">List of primes k.2^n + 1 for 300 < k < 600</a>
%H Y. Gallot, <a href="http://www.utm.edu/research/primes/programs/gallot/index.html">Proth.exe: Windows Program for Finding Large Primes</a>
%H Wilfrid Keller, <a href="http://www.prothsearch.com/riesel2.html">List of primes k.2^n - 1 for k < 300</a>
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/ProthPrime.html">Proth Prime</a>
%H <a href="/index/Pri#riesel">Index entries for sequences of n such that k*2^n-1 (or k*2^n+1) is prime</a>
%p select(n->isprime(323*2^n+1),[$1..1000]); # _Muniru A Asiru_, Dec 31 2018
%t Select[Range[1000], PrimeQ[323*2^# + 1] &] (* _Robert Price_, Dec 31 2018 *)
%Y Cf. A002255, A050527.
%K nonn,more,hard
%O 1,2
%A _Robert Price_, Dec 31 2018
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