Bifactor

The Bifactor is equal to 100!2 = (((....((100!)!)!....)!)!)! with 100 !s using Extensible ! Notation. The term was coined by Yabuszko.Yabuszko, Extensible ! Notation This number is comparable to grangol and giggol.
== Etymology ==
The name of this number is based on Greek prefix "bi-" and the factor.
== Approximations ==
Notation 	Approximation
Arrow notation 	\(82 \uparrow\uparrow 101\)
Chained arrow notation 	\(82 \rightarrow 101 \rightarrow 2\)
BEAF 	\(\{82,101,2\}\)
Hyper-E notation 	\(\text{E}160.16738266705673\#100\)
Hyperfactorial array notation	\(104!1\)
Strong array notation 	\(s(82,101,2)\)
Nested factorial notation 	\(100![2]\)
Fast-growing hierarchy 	\(f_3(100)\)
Hardy hierarchy 	\(H_{\omega^3}(100)\)
Slow-growing hierarchy 	\(g_{\varepsilon_0}(101)\)
== Sources ==
== See Also ==
Category:Numbers
Category:Orders of symmetric groups
Category:Factorial numbers
Category:Tetration level
Category:Numbers by Yabuszko