A200861 -id:A200861 - cp's OEIS frontend

A200879 Numbers n such that 10^n - 1 divides 10^(10^100) - 10.

1, 3, 9, 11, 33, 41, 99, 101, 123, 251, 271, 303, 369, 451, 753, 813, 909, 1111, 1353, 2259, 2439, 2761, 2981, 3333, 3541, 4059, 4141, 5051, 8283, 8943, 9091, 9999, 10291, 10623, 11111, 12423, 15153, 21401, 24849, 25351, 25601, 26829, 27273, 27371, 27961

Offset: 1

Arkadiusz Wesolowski, Nov 23 2011

Dario A. Alpern, Known prime factors of Googolplex - 10
Eric Weisstein's World of Mathematics, Googolplex

A200861 is a subsequence.

Prepend[Select[Range[3, 3000, 2], PowerMod[10, 10^100, 10^# - 1] == 10 &], 1]

A200924 Successive prime factors of 10^(10^100) - 10.

Original entry on oeis.org

2, 3, 3, 3, 3, 5, 37, 67, 83, 199, 397, 1231, 1627, 2707, 3637, 4519, 21649, 30307, 34849, 51203, 52711, 54547, 56369, 97561, 115963, 123493, 136043, 139987, 149077, 173923, 199999, 200003, 333667, 370477, 513239, 538987, 666733, 770437, 943081, 1466653

Offset: 1

Arkadiusz Wesolowski, Nov 24 2011

Dario A. Alpern, Known prime factors of Googolplex - 10
Eric Weisstein's World of Mathematics, Googolplex

Cf. A200861, A200879.

Join[{2, 3, 3, 3, 3, 5}, Select[Prime[Range[7^6]], PowerMod[10, 10^100, #] == 10 &]]

cp's OEIS Frontend

A200879 Numbers n such that 10^n - 1 divides 10^(10^100) - 10.

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