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%I #8 Feb 16 2020 18:30:45
%S 1,3,13,39,61,99,111,121,142,385,1753,2203,2581,3603,8674,10507,13815,
%T 19231,49255,53593,56754,73849,98655,100710,171001,241359,423535,
%U 617047,623979,1209435,1240510,2093022,2846547
%N Numbers k such that 369*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>
%t Select[Range[1000], PrimeQ[369*2^# + 1] &] (* _Robert Price_, Jan 01 2019 *)
%K nonn,more,hard
%O 1,2
%A _Robert Price_, Jan 01 2019
%E a(32)-a(33) from _Jeppe Stig Nielsen_, Feb 16 2020
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