A319487 Numbers k such that 477*2^k+1 is prime.

6, 7, 14, 15, 18, 27, 39, 42, 50, 54, 71, 88, 99, 102, 104, 138, 168, 275, 306, 615, 1274, 1375, 1824, 1890, 3055, 4379, 5167, 5538, 11775, 11895, 14567, 15547, 21746, 23250, 24824, 25322, 29310, 39567, 43806, 50560, 73370, 76074, 100215, 123528, 127599

Offset

1,1

Links

Jeppe Stig Nielsen, Table of n, a(n) for n = 1..55 (terms n = 1..54 from Robert Price)

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[477*2^# + 1] &]

Crossrefs

Sequence in context: A041319 A042315 A288667 * A283772 A080402 A146308

Adjacent sequences: A319484 A319485 A319486 * A319488 A319489 A319490

Keyword

nonn,hard

Author

Robert Price, Jan 07 2019

Status

approved