Grand tethrennon

The grand tethrennon is equal to E100#^^#^(9)100#2 = E100#^^#########100#2 in Extended Cascading-E Notation. The term was coined by Sbiis Saibian.
==Etymology==
The name of this number is based on the prefix "grand" and the number "tethrennon".
== Approximations in other notations ==
Notation 	Approximation
Bird's array notation 	\(\{100,3,2 [1 [2 \neg 2] 2] 2\}\)
Fast-growing hierarchy	\(f_{\varphi(9,0)}(f_{\varphi(9,0)}(99))\)
Hardy hierarchy 	\(H_{\varphi(9,0)*2}(100)\)
==Sources==
Category:Numbers
Category:Numbers by Sbiis Saibian
Category:Extended Cascading-E numbers
Category:Binary phi level