1,1

Is this sequence the same as "Primes p such that 10^p - 1 divides 10^(10^100) - 10"?

Table of n, a(n) for n=1..19.

Dario A. Alpern, Known prime factors of Googolplex - 10

Eric Weisstein's World of Mathematics, Googol

Join[{3}, Transpose[FactorInteger[10^100 - 1]][[1]]]

Subsequence of A178070 except for 3.

Sequence in context: A109937 A054101 A176956 * A113892 A334283 A078225

Adjacent sequences: A200858 A200859 A200860 * A200862 A200863 A200864

fini,full,nonn

Arkadiusz Wesolowski, Nov 23 2011

Name changed by T. D. Noe and Arkadiusz Wesolowski, Nov 29 2011

approved