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

Approximations

Notation Approximation
BEAF {100,100,100,99,1,1,2}
Bird's array notation {100,100,100,99,1,1,2}
Strong array notation s(100,100,101,99,1,1,2)
Fast-growing hierarchy \(f_{\omega^4+\omega^2}(100)\)
Hardy hierarchy \(H_{\omega^{\omega^4+\omega^2}}(100)\)
Slow-growing hierarchy \(g_{\varphi(1,0,0,\omega,0,0)}(100)\)

Sources

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