Deutero-tethrennon

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