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Not to be confused with megillion.

The mejillion is equal to $$10^{3\cdot10^{3\cdot 10^{3,000,000}} + 3}$$[1], or $$10^{3\cdot10^{3\cdot 10^{3\text{ million}}} + 3}$$. The term was coined by Jonathan Bowers. In his naming system, it is the smallest positive integer with the letter "j" in the name.

## Expressions in other notations

Notation Expression
Up-arrow notation $$10 \uparrow (3 \times (10 \uparrow (3 \times (10 \uparrow 3,000,000)))+3)$$
Chained arrow notation $$10 \rightarrow (3 \times (10 \rightarrow (3 \times (10 \uparrow 3,000,000)))+3)$$
BEAF $$\{10,\{3\times \{10,3 \times \{10,3000000\}\}+3\}\}$$
Munafo's ASCII-lexicographic ordering p3_e006_3000000477121255