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Myria-myria-taxis (also called octadia-taxis or gaggolbong) is equal to E1#1#100,000,000 using Hyper-E notation.[1] The term was coined by Sbiis Saibian. In arrow notation, this number is equal to $$10\uparrow\uparrow\uparrow 100,000,000$$ or 10 pentated to 100,000,000.

## Etymology

For myria-myria-taxis:

The 2 parts of the name, "myria-myria" and "taxis" means, "10,000×10,000" and tetration towers which formed 10↑↑↑100,000,000 when concentrated from left to right.

For gaggolbong:

The 2 parts of the name, "gaggol" and "bong" means, 10↑↑↑100 and the suffix which multiplies the base value by million which formed 10↑↑↑100,000,000 when concentrated from left to right.

## Approximations in other notations

Notation Approximation
BEAF $$\{10,\{10,8\},3\}$$ (exact)
Bird's array notation $$\{10,\{10,8\},3\}$$ (exact)
Chained arrow notation $$10 \rightarrow (10→8) \rightarrow 3$$ (exact)
Hyperfactorial array notation $$(12!)!2$$
Nested Factorial Notation $$(12!)![3]$$
Fast-growing hierarchy $$f_4(f_2(21))$$
Hardy hierarchy $$H_{\omega^{4}+\omega^{2}}(21)$$
Slow-growing hierarchy $$g_{\zeta_{\omega^{8}}}(10)$$