A108252 Primes p such that googol - p is prime.

797, 911, 3221, 3407, 5867, 6173, 8951, 10937, 12809, 13127, 14783, 20639, 22079, 22109, 25247, 26183, 27191, 29501, 29927, 30677, 31013, 31859, 33329, 34757, 34949, 35339, 35603, 35897, 37409, 38867, 40241, 41177, 42239, 44543, 44753, 48491, 49499, 49757, 51383

Offset

1,1

Comments

A googol = 10^100.

Links

Amiram Eldar, Table of n, a(n) for n = 1..10000

Mathematica

Select[Range[5*10^4], And @@ PrimeQ[{#, 10^100 - #} ] &] (* Amiram Eldar, Dec 26 2019 *)
Select[Prime[Range[5500]], PrimeQ[10^100-#]&] (* Harvey P. Dale, Dec 21 2022 *)

Prog

(PARI) g(n) = forstep(x=1, n, 2, if(isprime(10^100-x)&isprime(x), print1(x", ")))

Crossrefs

Cf. A108250.

Sequence in context: A086393 A336943 A108251 * A188536 A252346 A256026

Adjacent sequences: A108249 A108250 A108251 * A108253 A108254 A108255

Keyword

easy,nonn,fini

Author

Cino Hilliard, Jun 17 2005

Extensions

More terms from Amiram Eldar, Dec 26 2019

Status

approved