Lugubrigoogol

is equal to \(\{100,100[1[1\neg3]2]2\}\) in Bird's array notation, using the modified Hierarchical Hyper-Nested Array Notation. The term was coined by googology user .
It should not be confused with \([1[1\neg3]2]\) using Bird's original nested hyper-nested array notation, as this would equate to \([1[1\backslash 2\neg 2]2]\) using the modified Hierarchical Hyper-Nested Array Notation and only order type \(\Gamma_0\) in the Fast-growing hierarchy.
==Approximations==
Notation 	Approximation
Collapsing-E Notation 	\(\text{E}100\#\{\&\text{^^}\#\}\#100 = \text{E}100\#\{\&_2\}\#100\)
DeepLineMadom's Array Notation 	\(100[1\{1//2\}2\}2]100\)
Fast-growing hierarchy (with this system of fundamental sequences)	\(f_{\psi_0(\Omega_2)}(100)\)
Hardy hierarchy (with this system of fundamental sequences) 	\(H_{\psi_0(\Omega_2)}(100)\)
Slow-growing hierarchy (with this system of fundamental sequences)	\(g_{\psi_0(\Omega_3)}(100)\)
==Sources==
Category:Numbers
Category:Numbers by HaydenTheGoogologist2009
Category:Bachmann's collapsing level
Category:Bird's array notation numbers
Category:Irregular names