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

Etymology[]

The name of this number is based on the prefix "pepto-" and the number "tethrathoth".

Approximations in other notations[]

Notation Approximation
Hyperfactorial array notation \(100![1,1,5,1,2]\)
X-Sequence Hyper-Exponential Notation \(100\{(X\uparrow\uparrow X)^{5}\}100\)
Fast-growing hierarchy \(f_{\varepsilon_0^5}(100)\)
Hardy hierarchy \(H_{\varepsilon_0^{\varepsilon_0^4}}(100)\)
Slow-growing hierarchy \(g_{\vartheta(\varepsilon_{\Omega2}^4\varepsilon_{\Omega+1})}(100)\)

Sources[]

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