more big numbers:

Big Numbers
Even Bigger Number
A Googol is a “class-2” and he defines up to “class-6” and class-3 are the largest
numbers that can be theoretically computed and compared.
More Big Numbers
Including the defination of an “antonplex”
More big numbers>
This page includes the line:

One GOOGOL is a ONE followed by 100 zeroes.
One GOOGOLPLEX is a ONE followed by one googol zeroes.
        (you can't write a googolplex, even in a million years)

Which is They Might Be Giants lyric waiting to happen.

Or perhaps the Megapenny site.
Just to verify that It is possible for me to one day be a
millionaire as long as the unit in question is pennies.

Or perhaps the Borg Cube versus the
Cube of a Trillion Pennies.