A323029 Numbers k such that 377*2^k+1 is prime.

11, 143, 619, 3859, 2452639

Offset

1,1

Links

Table of n, a(n) for n=1..5.

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

Maple

select(k->isprime(377*2^k+1), [$1..1000]); # Muniru A Asiru, Jan 02 2019

Mathematica

Select[Range[1000], PrimeQ[377*2^# + 1] &] (* Robert Price, Jan 02 2019 *)

Crossrefs

Sequence in context: A024141 A289216 A296057 * A221580 A024140 A029529

Adjacent sequences: A323026 A323027 A323028 * A323030 A323031 A323032

Keyword

nonn,more,hard

Author

Robert Price, Jan 02 2019

Extensions

a(5) from Jeppe Stig Nielsen, Jan 04 2020

Status

approved