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Not to be confused with mejillion.

The megillion is equal to $$10^{3 \cdot 10^{3,000,000}+3}$$, or $$10^{3 \cdot 10^{3 \cdot \text{million}} +3}$$ [1] in the system devised by Jonathan Bowers.

## Etymology

The name of this number is based on the suffix "-illion" and SI prefix "mega-".

## Expressions in other notations

Notation Expression
Up-arrow notation $$10 \uparrow (3 \times (10 \uparrow 3,000,000)+3)$$ (exact)
Chained arrow notation $$10 \rightarrow (3 \times (10 \rightarrow 3,000,000)+3)$$ (exact)
BEAF $$\{10,\{3\times \{10,3000000\}+3\}\}$$ (exact)