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Dekulus is equal to $$10\ \&\ 10\ \&\ 10\ \&\ 10\ \&\ 10\ \&\ 10\ \&\ 10\ \&\ 10\ \&\ 10\ \&\ 10$$ = $$\lbrace 10,10 / 2 \rbrace$$ using the array of operator and BEAF.[1] The term was coined by Jonathan Bowers. The array of operator is unformalized at this level.

It was named Big Mac (named after the hamburger) by Cookiefonster before Bowers' name was added to his large numbers page.[2]

## Approximations

Notation Approximation
Bird's array notation $$\{10,10 [1 [1 /_{8} 1,2 /_{9} 2]_1 2] 2\}$$
Fast-growing hierarchy $$f_{\theta(\Omega_8^{\omega})}(10)$$