The terrible tethraducubor is equal to E100((#^^###)^^###)^^#100 using Extended Cascading-E Notation.[1] The term was coined by Sbiis Saibian.

Approximations

Notation Approximation
BEAF \((X\uparrow\uparrow\uparrow\uparrow3X)\uparrow\uparrow X\&100\)
Bird's array notation \(\{100,100[1\backslash2\backslash1\backslash2]2\}\)
Nested Cascading-E notation E100((#^^###)^^###)^^#100
Fast-growing hierarchy \(f_{\varepsilon_{\eta_2+1}}(100)\)
Hardy hierarchy \(H_{\varepsilon_{\eta_2+1}}(100)\)
Slow-growing hierarchy \(g_{\vartheta(\varepsilon_{\eta_{\Omega+3}+1})}(100)\)

Sources

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