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 A323195 Numbers k such that 451*2^k+1 is prime. 0
 12, 24, 4128, 6444, 6740, 49344, 66300, 72468, 186740, 282540, 512076, 976320, 1316832, 2124636, 2323952 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..15. 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 MATHEMATICA Select[Range[1000], PrimeQ[451*2^# + 1] &] CROSSREFS Sequence in context: A058994 A198808 A249134 * A033165 A224676 A239147 Adjacent sequences: A323192 A323193 A323194 * A323196 A323197 A323198 KEYWORD nonn,more,hard AUTHOR Robert Price, Jan 06 2019 EXTENSIONS a(14)-a(15) from Jeppe Stig Nielsen, Jan 04 2020 STATUS approved

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Last modified July 19 20:58 EDT 2024. Contains 374436 sequences. (Running on oeis4.)