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

1,1

Comments

Googol = 10^100.

Links

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

Mathematica

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

Prog

(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", "); ); ) }

Crossrefs

Cf. A001097, A001359, A006512, A133281.

Sequence in context: A186567 A235279 A358856 * A257724 A254016 A254023

Adjacent sequences: A133279 A133280 A133281 * A133283 A133284 A133285

Keyword

nonn,fini

Author

Cino Hilliard, Oct 13 2007, Feb 06 2008

Extensions

More terms from Amiram Eldar, Dec 26 2019

Status

approved