Simply, A googol to the power of a googol
was named by Robbie in 2006.

A googol is 10^100, or 1 and a hundred zeroes.
A googolplex is (10)^(10^100), this number is impossible to write down because it is bigger then the theorized number of atoms in the universe.
A Googolplexion is a Googol, to the power of a Googol, written in exponential form it's
(10^100)^(10^100), this number is incredibly bigger then a googolplex, and is extremely hard to imagine. (a googol times itself a googol ammount of times)