A319485 Numbers k such that 473*2^k+1 is prime.

1, 5, 37, 109, 2045, 49141, 54569, 65485, 148957, 174989, 180613, 231197, 479081, 1055381, 1769101

Offset

1,2

Links

Table of n, a(n) for n=1..15.

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[473*2^# + 1] &]

Crossrefs

Sequence in context: A142036 A249861 A358035 * A201119 A263783 A023289

Adjacent sequences: A319482 A319483 A319484 * A319486 A319487 A319488

Keyword

nonn,more,hard

Author

Robert Price, Jan 07 2019

Status

approved