Pentacthul-icoson

is equal to E100#^^^(#^20)100 using Extended Cascading-E NotationSaibian, Sbiis. 4.3.10 - xec_numbers4. Accessed 2023-10-21. This term was coined by Sbiis Saibian and is a member of the Pentacthultope regiment.
== Approximations in other notations ==
Notation 	Approximation
Bird's array notation 	\(\{100,20[1 [1 \backslash 2 \neg 2] 1 [2 \neg 2] 2]2\}\)
Fast-growing hierarchy 	\(f_{\varphi(1,19,0)}(100)\)
Slow-growing hierarchy (Using this system of fundamental sequences)	\(g_{\psi_0(\Omega_2^{\Omega_2+19})}(100)\)
== Sources ==
Category:Numbers
Category:Numbers by Sbiis Saibian
Category:Bachmann's collapsing level
Category:Extended Cascading-E numbers
Category:Pentacthultope series