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Megafugatwelve is equal to \(12\uparrow\uparrow12\) or \(12\uparrow\uparrow\uparrow2\) or 12 tetrated to 12 or 12 pentated to 2. It is approximately equal to \(E9,622,088,391,635\#10\) in Hyper-E notation.[1]

It is used in the definition of Little Bigeddon.

## Sources Edit

1. https://mrob.com/pub/comp/hypercalc/hypercalc-javascript.html