A318193 Numbers k such that 465*2^k+1 is prime.

2, 6, 9, 21, 41, 50, 74, 105, 119, 161, 191, 246, 255, 402, 419, 540, 941, 1085, 1245, 1250, 1415, 1992, 2169, 2243, 2640, 4908, 5102, 6410, 9078, 13215, 15609, 16239, 19059, 25070, 27326, 30455, 30681, 44255, 64833, 81269, 112710, 119001, 187589, 201468

Offset

1,1

Links

Jeppe Stig Nielsen, Table of n, a(n) for n = 1..61 (terms n = 1..58 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[465*2^# + 1] &]

Crossrefs

Sequence in context: A316429 A337639 A047161 * A048083 A127931 A346673

Adjacent sequences: A318190 A318191 A318192 * A318194 A318195 A318196

Keyword

nonn,hard

Author

Robert Price, Jan 07 2019

Status

approved