Zillian

Zillian is (TREE3^Grahams number+googolplexian x TREE3) = Zillian.
It's one of the biggest numbers to not be named, Zillian is much larger than the uncalculated Zillion and even Jillion.

Zillian is a very large number yet to be calculated.

Guy 1: Damn there's a zillian stars out tonight
Guy 2: I know right