A108256 Primes p such that little googol - p is prime.

479, 1187, 1289, 2609, 2699, 2999, 3347, 3923, 3989, 4289, 4583, 5009, 5309, 5417, 5807, 6047, 6053, 6257, 6599, 6779, 7103, 7253, 7727, 9029, 10433, 10667, 11093, 11549, 11579, 12377, 13007, 14243, 14867, 15287, 15683, 16187, 17519, 17669

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Formula

A little googol = 2^100.

Mathematica

With[{lg=2^100}, Select[Prime[Range[2100]], PrimeQ[lg-#]&]] (* Harvey P. Dale, Mar 08 2014 *)

Prog

(PARI) g(n) = forstep(x=1, n, 2, if(isprime(2^100-x)&isprime(x), print1(x", ")))

Crossrefs

Sequence in context: A056987 A323051 A025025 * A262222 A115157 A019287

Adjacent sequences: A108253 A108254 A108255 * A108257 A108258 A108259

Keyword

easy,nonn

Author

Cino Hilliard, Jun 18 2005

Status

approved