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 A322960 Numbers k such that 335*2^k+1 is prime. 0
 19, 23, 29, 173, 263, 295, 659, 803, 1075, 1087, 1129, 1189, 3173, 4519, 16277, 44425, 67069, 103789, 151319, 189379, 323767, 356029, 409429, 528439, 1335337 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..25. 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^n-1 (or k*2^n+1) is prime MAPLE select(n->isprime(335*2^n+1), [\$1..1000]); # Muniru A Asiru, Dec 31 2018 MATHEMATICA Select[Range[1000], PrimeQ[335*2^# + 1] &] (* Robert Price, Dec 31 2018 *) CROSSREFS Cf. A002255, A050527. Sequence in context: A088987 A364458 A217281 * A348935 A019360 A269666 Adjacent sequences: A322957 A322958 A322959 * A322961 A322962 A322963 KEYWORD nonn,more,hard AUTHOR Robert Price, Dec 31 2018 STATUS approved

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Last modified February 27 16:21 EST 2024. Contains 370378 sequences. (Running on oeis4.)