Googolxennaplex

A googolxennaplex is equal to a googol followed by a octillion plexes. In Hyper-E notation it can be written E100#(octillion+1) and as power tower, 1010 ... 10 100  (with octillion 10's).

Etymology
The name of this number is based on SI prefix "xenna-" and the number "googolplex".