The nonicahlah-ex-grand tethrathoth is equal to E100#^^#100#(1+E100#^#^#9) using Extended Cascading-E Notation.[1] The term was coined by Sbiis Saibian.


The name of this number is based on the number nonicahlah and the number "grand tethrathoth".


Notation Approximation
BEAF \(\{100,\text{nonicahlah}+2,2(X\uparrow\uparrow X)2\}\)[2]
Bird's array notation \(\{100,\text{nonicahlah}+2,2[1\backslash2]2\}\)
Hyperfactorial array notation \(\text{nonicahlah}![2,1,1,1,2]\)
Fast-growing hierarchy \(f_{\varepsilon_0+1}(\text{nonicahlah}+1)\)
Hardy hierarchy \(H_{\varepsilon_0\omega}(\text{nonicahlah}+1)\)
Slow-growing hierarchy \(g_{\vartheta(\varepsilon_{\Omega2})}(\text{nonicahlah}+1)\)


  1. Saibian, Sbiis. 4.3.7 Extended Cascading-E Numbers Part IOne to Infinity. Retrieved 2017-01-02.
  2. Using particular notation \(\{a,b (A) 2\} = A \&\ a\) with prime b.
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