Tethra-ogdon

Tethra-ogdon is equal to E100#^^#^#8 = E100#^^########100 in Extended Cascading-E Notation. The term was coined by Sbiis Saibian.
==Etymology==
The name of this number is based on the number tethrathoth and the root "yotton" from "polyyotton". Polyyotton is the name for a 9-dimensional figure and 9-D figures are constructed from multiple 8-D figures (hence the "poly"), so a "yotton" can be considered a 8-dimensional figure.
== Approximations in other notations ==
Notation 	Approximation
BEAF 	\(X \uparrow\uparrow X^8 \&\ 100\)
Bird's array notation 	\(\{100,9 [1 [2 \neg 2] 2] 2\}\)
Hyperfactorial array notation	\(100![1] w/11\)
Fast-growing hierarchy 	\(f_{\varphi(8,0)}(99)\)
Hardy hierarchy 	\(H_{\varphi(8,0)}(100)\)
Slow-growing hierarchy 	\(g_{\vartheta(\varphi(8,\Omega+1))}(100)\)
==Sources==
Category:Numbers
Category:Numbers by Sbiis Saibian
Category:Extended Cascading-E numbers
Category:Binary phi level
Category:Tethracubor series
Category:Tethra-ogdon regiment