The tethracubor-by-godgahlah is equal to E100#^^###*#^#100 using Extended Cascading-E Notation.[1] The term was coined by Sbiis Saibian.

Approximations in other notations

Notation Approximation
BEAF \(\{100,101(X \uparrow\uparrow\uparrow\uparrow X)(1) 2\}\)[2] (weak bound)

\(\{100,101(X \uparrow\uparrow X^{3})(1) 2\}\) (strong bound)

Bird's array notation ???
Fast-growing hierarchy \(f_{{\varphi(3,0)} {\omega^{\omega}}}(100)\)
Hardy hierarchy \(H_{{\varphi(3,0)}^{\omega^{\omega}}}(100)\)
Slow-growing hierarchy \(g_{\vartheta(\varphi(3,{\Omega 2}) \Omega^{\omega})}(99)\)


  1. Saibian, Sbiis. 4.3.7 Extended Cascading-E Numbers Part IOne to Infinity. Retrieved 2017-03-15.
  2. Using particular notation \(\{a,b (X \uparrow\uparrow X) 2\}\) for \(X \uparrow\uparrow b\ \&\ a\)
Community content is available under CC-BY-SA unless otherwise noted.