A323146 Numbers k such that 435*2^k+1 is prime.

2, 4, 5, 7, 11, 18, 19, 33, 51, 68, 69, 82, 93, 99, 101, 113, 132, 138, 141, 198, 201, 255, 298, 522, 528, 533, 537, 547, 790, 903, 1032, 1195, 1365, 1612, 1725, 2223, 2343, 2398, 3740, 4138, 4315, 6285, 7161, 10401, 13444, 19922, 23030, 26104, 26922, 28617

Offset

1,1

Links

Jeppe Stig Nielsen, Table of n, a(n) for n = 1..95 (terms n = 1..86 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.

Maple

select(k->isprime(435*2^k+1), [$1..1000]); # Muniru A Asiru, Jan 05 2019

Mathematica

Select[Range[1000], PrimeQ[435*2^# + 1] &]

Crossrefs

Sequence in context: A010065 A344654 A164316 * A250006 A257033 A039674

Adjacent sequences: A323143 A323144 A323145 * A323147 A323148 A323149

Keyword

nonn,hard

Author

Robert Price, Jan 05 2019

Status

approved