1,1

Second term is not known. Sequence continues ?, 1429, 1129, 29, ?, 53, 427169, 5501, 19, 59, 1327, 1645318771, 61, 211, 17, 1831, ?, 43, 389, 173, 233886337, 139, 1451, 18797, 31, 37, 8297, 19, 13879, ?, 9241, 17, 29, ...

All unknown members of the sequence must be greater than 10^14. - Dario Alejandro Alpern (alpertron(AT)hotmail.com), May 17 2003

Tanya Khovanova, Non Recursions

Dario Alejandro Alpern, Factors of 1000 numbers starting from googolplex

Robert Harley, Factors of Googolplex+1 (Found first term.)

Eric Weisstein's World of Mathematics, Googolplex

(* For any individual n *) k = 17; While[ !PrimeQ[k] || PowerMod[10, 10^100, k] + n != k, k += 2]; k

Cf. A078814.

Sequence in context: A095462 A115543 A095464 this_sequence A003854 A003847 A095466

Adjacent sequences: A072285 A072286 A072287 this_sequence A072289 A072290 A072291

hard,nonn,bref,more,less

Ed Pegg, Jr. (edp(AT)wolfram.com) and Robert G. Wilson v (rgwv(AT)rgwv.com), Nov 21 2002