A323007 Numbers k such that 365*2^k+1 is prime.

5, 11, 19, 63, 93, 95, 103, 147, 275, 293, 539, 623, 1115, 1181, 1691, 1811, 2711, 2919, 3467, 4067, 5115, 5815, 6279, 7877, 8831, 18717, 24399, 25125, 27199, 32823, 122075, 162789, 276735, 561783, 586189, 1577413, 2355607, 2494991

Offset

1,1

Links

Table of n, a(n) for n=1..38.

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[365*2^# + 1] &] (* Robert Price, Jan 01 2019 *)

Crossrefs

Sequence in context: A045452 A152085 A267603 * A370682 A297365 A128927

Adjacent sequences: A323004 A323005 A323006 * A323008 A323009 A323010

Keyword

nonn,more,hard

Author

Robert Price, Jan 01 2019

Extensions

a(37)-a(38) from Jeppe Stig Nielsen, Jan 04 2020

Status

approved