User blog comment:I am a McCree God/Urasillion/@comment-29065906-20171213182357/@comment-80.98.179.160-20171221192806

Your urasillion can be easily confused with my uracillion, $$10^{a_{23}}$$, with $$a_0=(10^{421290}+1)421290,a_{n+1}=(10^{a_n}+1)421290$$.