Ento-terinngathor is equal to E100#^(#^####*#)9 using Cascading-E Notation.[1] The term was coined by Sbiis Saibian.

Approximations

Notation Approximation
BEAF {100,9(1,0,0,0,1)2}
Bird's array notation {100,9[2,1,1,1,2]2}
Fast-growing hierarchy \(f_{\omega^{\omega^{\omega^4+1}}}(9)\)
Hardy hierarchy \(H_{\omega^{\omega^{\omega^{\omega^4+1}}}}(9)\)
Slow-growing hierarchy \(g_{\theta(\Omega^{\Omega^{\Omega^4+1}})}(9)\)

Sources

  1. Saibian, Sbiis. 4.3.5 Cascading-E NumbersOne to Infinity. Retrieved 2016-09-09.
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