Tethracross

Tethracross (also called tethrasquare and hecatastaculated-tethrathoth) 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. Tethracross has similar size to Cookie Fonster's boppatoth.
== Etymology ==
The name of this number is based on the number tethrathoth and the word "cross".
== Approximations in other notations ==
Notation 	Approximation
BEAF 	\(X \uparrow\uparrow X^{2}\ \&\ 100\)
Bird's array notation 	\(\{100,100 [1 \backslash 1 \backslash 2] 2\}\)
Hyperfactorial array notation 	\(100![1,1,1,1,1,2]\)
Fast-growing hierarchy 	\(f_{\zeta_0}(100)\)
Hardy hierarchy 	\(H_{\zeta_0}(100)\)
Slow-growing hierarchy (using Buchholz hierarchy)	\(g_{\psi_0(\Omega_2^2)}(100)\)
X-Sequence Hyper-Exponential Notation 	100[X>>X]100
== Sources ==
Category:Numbers
Category:Numbers by Sbiis Saibian
Category:Extended Cascading-E numbers
Category:Epsilon level
Category:Tethracross series