A323005 Numbers k such that 361*2^k+1 is prime.

28, 36, 100, 312, 568, 2584, 9144, 37284, 96720, 105132, 147084, 222292, 280728, 292600, 1459308, 2312832, 2424232

Offset

1,1

Links

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

Mathematica

Select[Range[1000], PrimeQ[361*2^# + 1] &] (* Robert Price, Jan 01 2019 *)

Crossrefs

Sequence in context: A359529 A105710 A192226 * A080983 A179105 A096430

Adjacent sequences: A323002 A323003 A323004 * A323006 A323007 A323008

Keyword

nonn,more,hard

Author

Robert Price, Jan 01 2019

Extensions

a(16)-a(17) from Jeppe Stig Nielsen, Jan 04 2020

Status

approved