5
Wezel's Number
It goes like this:
↨= Googolplex^Googolplex^Googolplex^Googolplex^Googolplex^……..^Googolplex
ß--------------------------------------------------------------------------------------------------à
Repeat Googolplex times.
↨↨=↨^↨^↨^↨^↨^……..^↨
ß------------------à
Repeat ↨ times
↨↨↨=↨↨^↨↨^↨↨^↨↨^↨↨^↨↨^…….^↨↨
ß--------------------------------à
Repeat ↨↨ times
Etc……
Now Wezel’s number contains a Googolplexian ↨’s… Just imagine.