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A322951
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Numbers k such that 319*2^k+1 is prime.
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0
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2, 10, 18, 274, 314, 522, 562, 578, 594, 602, 930, 1074, 23826, 184554, 1923378, 2248914, 2290722
(list;
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history;
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internal format)
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OFFSET
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1,1
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LINKS
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Table of n, a(n) for n=1..17.
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
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MAPLE
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select(n->isprime(319*2^n+1), [$1..1000]); # Muniru A Asiru, Dec 31 2018
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MATHEMATICA
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Select[Range[1000], PrimeQ[319*2^# + 1] &] (* Robert Price, Dec 31 2018 *)
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CROSSREFS
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Cf. A002255, A050527.
Sequence in context: A346551 A180591 A330083 * A156446 A032685 A085936
Adjacent sequences: A322948 A322949 A322950 * A322952 A322953 A322954
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KEYWORD
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nonn,more,hard
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AUTHOR
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Robert Price, Dec 31 2018
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EXTENSIONS
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a(16)-a(17) from Jeppe Stig Nielsen, Feb 25 2020
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STATUS
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approved
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