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 A322916 Numbers k such that 303*2^k+1 is prime. 1
 1, 2, 5, 8, 9, 10, 13, 17, 21, 30, 38, 93, 125, 140, 170, 178, 181, 394, 453, 588, 1161, 1221, 1573, 1665, 1745, 3613, 3661, 5750, 6002, 6198, 6393, 6764, 7209, 7514, 9444, 13034, 15277, 16070, 20042, 22970, 22977, 25674, 28438, 31040, 35137, 42410, 60285 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Jeppe Stig Nielsen, Table of n, a(n) for n = 1..72 (terms n = 1..68 from Robert Price) Ray Ballinger, Proth Search Page Ray Ballinger and Wilfrid Keller, List of primes k.2^n + 1 for 300 < k < 600 Wilfrid Keller, List of primes k.2^n - 1 for k < 300 Eric Weisstein's World of Mathematics, Proth Prime MAPLE select(n->isprime(303*2^n+1), [\$1..1000]); # Muniru A Asiru, Dec 31 2018 MATHEMATICA Select[Range[1000], PrimeQ[303*2^# + 1] &] (* Robert Price, Dec 30 2018 *) CROSSREFS Cf. A002255, A050527. Sequence in context: A068537 A047620 A283205 * A062803 A231756 A212591 Adjacent sequences:  A322913 A322914 A322915 * A322917 A322918 A322919 KEYWORD nonn,hard AUTHOR Robert Price, Dec 30 2018 STATUS approved

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Last modified June 4 01:21 EDT 2020. Contains 334808 sequences. (Running on oeis4.)