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Gongulus is equal to $$\{10,10 (100) 2\}$$ in BEAF.[1] It is equivalent to solving a centeract (a 100-dimensional analog of the cube) of 10s with sidelength 10, and can thus be written 10100 & 10 using the array of operator. It has googol 10's. The term was coined by Jonathan Bowers.

In the article "Why Does God Exist?",[2] Bowers makes a mention of "minus gongulus", making it the least real number explicitly mentioned on his site.

The full array has googol entries. It is visualized like:

{10,10,...,10,10(1)...(1)10,10,...,10,10(2)...(1)...(2)...(3)...(4)...(5)...(98)...(99)...(100)...(99)...(98)...(5)...(4)...(3)...(2)...(1)...(2)10,10,...,10,10(1)...(1)10,10,...,10,10}

## Approximations

Notation Approximation
Bird's array notation $$\{10,10 [101] 2\}$$ (exact value)
Cascading-E notation $$\textrm{E}10\#\text{^}\#\text{^}\#100$$
Hyperfactorial Array Notation $$10![1,[1,1,101],1,2]$$
X-Sequence Hyper-Exponential Notation $$10\{X^{X^X}\}100$$
Fast-growing hierarchy $$f_{\omega^{\omega^{100}}}(10)$$
Hardy hierarchy $$H_{\omega^{\omega^{\omega^{100}}}}(10)$$
Slow-growing hierarchy $$g_{\vartheta(\Omega^{\Omega^{99}\omega})}(10)$$

## Sources

1. Bowers, JonathanInfinity Scrapers. Retrieved January 2013.
2. Bowers, Jonathan. Why Does God Exist?. Retrieved 3 June 2014.