A323002 Numbers k such that 355*2^k+1 is prime.

6, 12, 24, 34, 46, 138, 174, 816, 1164, 1668, 1704, 5334, 10126, 11340, 13818, 18564, 82968, 202986, 241368, 285492, 1482390

Offset

1,1

Links

Table of n, a(n) for n=1..21.

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[355*2^# + 1] &] (* Robert Price, Jan 01 2019 *)

Crossrefs

Sequence in context: A263849 A227416 A106697 * A249127 A277336 A140522

Adjacent sequences: A322999 A323000 A323001 * A323003 A323004 A323005

Keyword

nonn,more,hard

Author

Robert Price, Jan 01 2019

Status

approved