Grand Berlin Wall

The grand Berlin Wall is equal to E100#^^##(Berlin Wall) = E100#^^#>#^^#>#^^#>...>#^^#>#^^#100 (Berlin Wall #^^#'s) in Extended Cascading-E Notation. The term was coined by Sbiis Saibian.
== Approximations in other notations ==
Notation 	Approximation
BEAF 	\(X \uparrow\uparrow X \uparrow 2\ \&\ \text{Berlin Wall}\)
Bird's array notation 	\(\{100,\text{Berlin Wall} [1 \backslash 1 \backslash 2] 2\}\)
Hyperfactorial array notation	\((100,000,000![1,1,1,1,1,2])![1,1,1,1,1,2]\)
Fast-growing hierarchy 	\(f_{\zeta_0}(f_{\zeta_0}(99,999,999))\)
Hardy hierarchy 	\(H_{\zeta_0 2}(100,000,000)\)
Slow-growing hierarchy 	\(g_{\vartheta(\zeta_{\Omega+1})}(g_{\vartheta(\zeta_{\Omega+1})}(100,000,000))\)
==Sources==
Category:Numbers
Category:Numbers by Sbiis Saibian
Category:Extended Cascading-E numbers
Category:Binary phi level