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A fugagoogol is equal to googolgoogolgoogol-1, or $$\text{googol} \downarrow\downarrow \text{googol}$$ in down-arrow notation.[1] The name is formed by applying the fuga- suffix to a googolplex. It is equal to 101010102-98, meaning that it is roughly comparable to a googolduplex, at least in googological terms. In fact, one would have to raise a googolduplex to the googolplexth power 99 times to surpass a fugagoogol.

## Sources

1. Saibian, Sbiis. 3.2.2 - The Fz, The Fuga & The Megafuga. Retrieved 2015-03-10.