A323199 Numbers k such that 459*2^k+1 is prime.

1, 3, 9, 18, 19, 21, 29, 35, 51, 53, 57, 75, 111, 150, 175, 273, 279, 306, 317, 475, 669, 717, 750, 1291, 1326, 1449, 1483, 1505, 1779, 2011, 2745, 3503, 3978, 6190, 6634, 7137, 8529, 10883, 12465, 17777, 18155, 18490, 26211, 26723, 27730, 28038, 28074

Offset

1,2

Links

Jeppe Stig Nielsen, Table of n, a(n) for n = 1..78 (terms n = 1..70 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[459*2^# + 1] &]

Crossrefs

Sequence in context: A310331 A261952 A066006 * A360365 A310332 A210991

Adjacent sequences: A323196 A323197 A323198 * A323200 A323201 A323202

Keyword

nonn,hard,changed

Author

Robert Price, Jan 06 2019

Status

approved