How should sequences with unknown terms be entered? Smallest nontrivial prime factors of Googleplex + n ?, ?, 7, 1129, 29, ?, 53, ?, 5501, 7, 59, 1327, ?, 61, 211, 17, 7, ?, 43, 389, 173, ?, 13, 7, 18797, 31, 37, 8297, 19, 13879 (Here, I define trivial prime factors as 2, 3, 5, and 11 -- those with easy primality tests.) --Ed Pegg Jr.