Tethrateron

Tethrateron (also called tethratesseract and tethraterror) is equal to E100#^^####100 in Extended Cascading-E Notation, which expands to E100#^^###>#^^###>#^^###> ... ... >#^^###>#^^###>#^^###100 with 100 #^^###s. The term was coined by Sbiis Saibian.
== Etymology ==
The name of this number is based on the number tethrathoth and the root "teron" from "polyteron". Polyteron is the name for a 5-dimensional figure and 5-D figures are constructed from multiple 4-D figures (hence the "poly"), so a "teron" can be considered a 4-dimensional figure.
== Approximations in other notations ==
Notation 	Approximation
BEAF 	\(X \uparrow^5 101\ \&\ 100\)
Bird's array notation 	\(\{100,100 [1 \backslash 1 \backslash 1 \backslash 1 \backslash 2] 2\}\)
Hyperfactorial array notation	\(100![1] w/7\)
Fast-growing hierarchy 	\(f_{\varphi(4,0)}(99)\)
Hardy hierarchy 	\(H_{\varphi(4,0)}(100)\)
Slow-growing hierarchy 	\(g_{\vartheta(\varphi(4,\Omega+1))}(100)\)
== Sources ==
Category:Numbers
Category:Numbers by Sbiis Saibian
Category:Extended Cascading-E numbers
Category:Binary phi level
Category:Tethracubor series
Category:Tethrateron regiment