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

Approximations in other notations

Notation Approximation
BEAF \(\{100,101,1,1,1,1,2\}\)
Hyperfactorial array notation \(100![2,1,4]\)
Fast-growing hierarchy \(f_{\omega^4+1}(100)\)
Hardy hierarchy \(H_{\omega^{\omega^4+1}}(100)\)
Slow-growing hierarchy \(g_{\varphi(1,0,0,0,0,0)}(100)\)

Sources

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