This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A322963 Numbers k such that 341*2^k+1 is prime. 0
 1, 3, 7, 19, 21, 33, 43, 99, 183, 235, 499, 579, 1137, 1225, 1941, 1987, 2409, 3285, 9093, 9121, 11043, 14997, 17919, 31543, 57163, 83595, 127915, 129199, 220651, 384961, 1255881, 1325277, 1728697 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS 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(341*2^n+1), [\$1..1000]); # Muniru A Asiru, Dec 31 2018 MATHEMATICA Select[Range[1000], PrimeQ[341*2^# + 1] &] (* Robert Price, Dec 31 2018 *) CROSSREFS Cf. A002255, A050527. Sequence in context: A032667 A109991 A248219 * A018432 A205302 A127925 Adjacent sequences:  A322960 A322961 A322962 * A322964 A322965 A322966 KEYWORD nonn,more,hard AUTHOR Robert Price, Dec 31 2018 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified June 16 03:44 EDT 2019. Contains 324145 sequences. (Running on oeis4.)