A318195 Numbers k such that 469*2^k+1 is prime.

2, 190, 242, 326, 1562, 31430, 43666, 497206, 504610, 4414802

Offset

1,1

Links

Table of n, a(n) for n=1..10.

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[469*2^# + 1] &]

Crossrefs

Sequence in context: A053936 A252765 A172801 * A307587 A235680 A085937

Adjacent sequences: A318192 A318193 A318194 * A318196 A318197 A318198

Keyword

nonn,more,hard

Author

Robert Price, Jan 07 2019

Extensions

a(10) from Jeppe Stig Nielsen, Dec 18 2024

Status

approved