Pentabackthulhum

is equal to \(\{10,10[1[1\backslash2\neg2]2]2\}\) in Bird's array notation, using the modified Hierarchical Hyper-Nested Array Notation.AR Googol - Numbers from Bird's array notation Retrieved 2024-09-17. The term was coined by googology user .
==Approximations==
Notation 	Approximation
Almighty Array Notation 	\(a\text{*}(10,10\{1<1!2>2\}2)\)
Bowers' Exploding Array Function (intended) 	\(\{X,X,1,2\} \& 10\) (weak bound, non-climbing)
\(X \uparrow\uparrow\uparrow X \& 10\) (strong bound, climbing)
Extended Cascading-E Notation 	\(\text{E}10\#\text{^^^}\#10\)
DeepLineMadom's Array Notation 	\(10[1\{1<1/2>2\}2]10\)
Hayden's Extended Array Notation 	\(10 [1[1\neg3]2]_2 10\)
Strong array notation 	\(\text{s}(10,10\{1\{1`2^{`}\}2\}2)\)
Username5243's Array Notation 	\(10[0\{0\{0,1\}_1 1\}1]10\)
Fast-growing hierarchy 	\(f_{\Gamma_0}(10)\)
Hardy hierarchy 	\(H_{\Gamma_0}(10)\)
Slow-growing hierarchy (with this system of fundamental sequences)	\(g_{\psi_0(\Omega_{2}^{\Omega_{2}})}(10)\)
==Sources==
Category:Numbers
Category:Numbers by ARsygo
Category:Binary phi level
Category:Bird's array notation numbers