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A322964 Numbers k such that 343*2^k+1 is prime. 0
2, 20, 22, 46, 58, 226, 3760, 7060, 16192, 22018, 35576, 103952, 113326, 120716, 285122, 543148, 785510, 1033126 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
Ray Ballinger, Proth Search Page
Ray Ballinger and Wilfrid Keller, List of primes k.2^n + 1 for 300 < k < 600
Eric Weisstein's World of Mathematics, Proth Prime
MAPLE
select(n->isprime(343*2^n+1), [$1..1000]); # Muniru A Asiru, Dec 31 2018
MATHEMATICA
Select[Range[1000], PrimeQ[343*2^# + 1] &] (* Robert Price, Dec 31 2018 *)
CROSSREFS
Sequence in context: A136906 A260570 A022372 * A112405 A136885 A359611
KEYWORD
nonn,more,hard
AUTHOR
Robert Price, Dec 31 2018
STATUS
approved

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Last modified July 15 18:49 EDT 2024. Contains 374333 sequences. (Running on oeis4.)