A133282 Numbers k such that googol - k is an upper twin prime.

35217, 85077, 253407, 326271, 343131, 349527, 356667, 408609, 471729, 517707, 582069, 613299, 614997, 661947, 667827, 793359, 810099, 852579, 876687, 960897, 1006041, 1023807, 1076211, 1089411, 1102461, 1179807, 1264467, 1355997, 1384617, 1649049, 1652127, 1661799

Offset: 1

Author

Cino Hilliard, Oct 13 2007, Feb 06 2008

Keywords

• nonn
• fini

Comments

Googol = 10^100.

Links

• Amiram Eldar, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A001097, A001359, A006512, A133281.

Programs

Mathematica

Select[Range[10^6],And @@ PrimeQ[10^100 - # - {0, 2}] &] (* Amiram Eldar, Dec 26 2019 *)

PARI

googol2(n) = { local(x,a,j); x=10^100; forstep(j=1,1000000,2, a=x-j; if(ispseudoprime(a)&ispseudoprime(a-2), print1(j","); ); ) }

Extensions

More terms from Amiram Eldar, Dec 26 2019