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Grand tetroogol is equal to E100####100#2 using Extended Hyper-E notation.[1] The term was coined by Sbiis Saibian.

Approximations in other notations

Notation Approximation
BEAF \(\{100,101,99,99,\{100,101,99,99,99\}\}\)
Chained arrow notation (using Peter Hurford's extensions) \(100 \rightarrow_{100 \rightarrow_{101} 100} 100\)
Fast-growing hierarchy \(f_{\omega^3}(f_{\omega^3}(100))\)
Hardy hierarchy \(H_{(\omega^{\omega^3}) 2}(100)\)
Slow-growing hierarchy \(g_{\varphi(99,99,\varphi(99,99,98,0),0)}(100)\)


Sources

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