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The upside-down zootzootplex is equal to $$2^{3^{4^{5^{6^{7\dots(\text{googolplex-2})^{(\text{googolplex-1})^{\text{googolplex}}}}}}}}$$.[1] The power tower of it is a reversed version of zootzootplex but it starts with 2 instead of 1 to avoid the degeneration into 1. This number is comparable to and slightly bigger than googolplexidex.

## Sources Edit

1. Pointless Gigantic List of Numbers Part 3: The Friendly PreliminariesPointless Large Number Stuff. Retrieved 2017-07-22.