This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A200924 #9 Jul 09 2023 11:49:11 %S A200924 2,3,3,3,3,5,37,67,83,199,397,1231,1627,2707,3637,4519,21649,30307, %T A200924 34849,51203,52711,54547,56369,97561,115963,123493,136043,139987, %U A200924 149077,173923,199999,200003,333667,370477,513239,538987,666733,770437,943081,1466653 %N A200924 Successive prime factors of 10^(10^100) - 10. %H A200924 Dario A. Alpern, <a href="https://www.alpertron.com.ar/googolm.pl">Known prime factors of Googolplex - 10</a> %H A200924 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Googolplex.html">Googolplex</a> %t A200924 Join[{2, 3, 3, 3, 3, 5}, Select[Prime[Range[7^6]], PowerMod[10, 10^100, #] == 10 &]] %Y A200924 Cf. A200861, A200879. %K A200924 fini,nonn %O A200924 1,1 %A A200924 _Arkadiusz Wesolowski_, Nov 24 2011