The ennaeltrigathor is equal to E100(#^#^#^9)100(#^#^#^9)100 using Cascading-E Notation.[1] The term was coined by Sbiis Saibian.


The name of this number is based on the infix "-tri-" and the number "ennaelgathor".

Approximations in other notations

Notation Approximation
BEAF \(\{100,100 (0,0,0,0,0,0,0,0,0,1) 3\}\)
Bird's array notation \(\{100,100 [1,1,1,1,1,1,1,1,1,2] 3\}\)
Fast-growing hierarchy \(f_{(\omega^{\omega^{\omega^9}}) 2}(100)\)
Hardy hierarchy \(H_{\omega^{(\omega^{\omega^{\omega^9}}) 2}}(100)\)
Slow-growing hierarchy \(g_{\theta(\Omega^{\Omega^{\Omega^9}} + \Omega^{\Omega^{\Omega^8 \omega}})}(100)\)


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