Pepto-tethrapeton is equal to E100(#^^#^5)^#5 using Extended Cascading-E Notation.[1] The term was coined by Sbiis Saibian.

Approximations

Notation Approximation
Fast-growing hierarchy \(f_{\omega^{\omega^{\varphi(5,0)+1} } }(5)\)
\(=f_{\varphi(5,0)^\omega}(5)\)

Sources

  1. Saibian, Sbiis. 4.3.7 Extended Cascading-E Numbers Part IOne to Infinity. Retrieved 2017-01-02.
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