Ento-tethrafact

Ento-tethrafact is equal to E100(#^^#)^##9 in Extended Cascading-E Notation. The term was coined by Sbiis Saibian. This number belongs to the tethrathoth regiment.
==Etymology==
The name of this number is based on the greek number "ennea" and the number "tethrafact".
==Approximations in other notations==
Notation 	Approximation
BEAF 	\(\{100,9(X \uparrow\uparrow X*X^2) 2\}\)
Fast-growing hierarchy	\(f_{\varepsilon_0^{\omega9}}(100)\)
\(f_{\omega^{\omega^{\varepsilon_0+1}9}}(100)\)
Hardy hierarchy 	\(H_{\varepsilon_0^{\varepsilon_0^{\omega9}}}(100)\)
==Sources==
Category:Numbers by Sbiis Saibian
Category:Numbers
Category:Cascading-E numbers