Deutero-hexaelgathor is equal to E100(#^#^#^6)*(#^#^#^6)100 using Cascading-E Notation.[1] The term was coined by Sbiis Saibian.

Approximations in other notations

Notation Approximation
BEAF \(\{100,100 (0,0,0,0,0,0,1)(0,0,0,0,0,0,1) 2\}\)
Bird's array notation \(\{100,100 [1,1,1,1,1,1,2]1[1,1,1,1,1,1,2] 2\}\)
Hyperfactorial array notation ???
Fast-growing hierarchy \(f_{\omega^{(\omega^{\omega^6}) 2}}(100)\)
Hardy hierarchy \(H_{\omega^{\omega^{(\omega^{\omega^6}) 2}}}(100)\)
Slow-growing hierarchy \(g_{\theta(\Omega^{\Omega^{\Omega^6} + \Omega^{\Omega^5 \omega}})}(100)\)


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