Vigesimal-Googolplex

The vigesimal-googolplex is equal to 2020100 ~ 101.649*10130.Part 1 - My Large Numbers The term was coined by Wikia user Username5243.
==Approximations==
Notation 	Lower bound 	Upper bound
Arrow notation 	\(20\uparrow20\uparrow100\) 	\(20\uparrow20\uparrow100\)
Down-arrow notation 	\(20\downarrow\downarrow101\) 	\(20\downarrow\downarrow101\)
Steinhaus-Moser Notation 	69[3][3] 	70[3][3]
Copy notation 	1[1[131]] 	2[2[131]]
H* function 	H(5H(42)) 	H(6H(42))
Taro's multivariable Ackermann function	A(3,A(3,431)) 	A(3,A(3,432))
Pound-Star Notation 	#*((1))*(1,9,6,2,1,3)*7 	#*((1))*(1,0,6,7,5)*9
BEAF 	{20,{20,100}} 	{20,{20,100}}
Hyper-E notation 	E[20]100#2 	E[20]100#2
Bashicu matrix system 	(0)(1)[20] 	(0)(1)[21]
Hyperfactorial array notation 	(84!)! 	(85!)!
Fast-growing hierarchy 	\(f_2(f_2(425))\) 	\(f_2(f_2(426))\)
Hardy hierarchy 	\(H_{\omega^22}(425)\) 	\(H_{\omega^22}(426)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^{\omega5}}}(20)\)	\(g_{\omega^{\omega^{\omega5}}}(20)\)
== Sources ==
Category:Numbers
Category:Numbers by Username5243
Category:Class 3
Category:Powers of 20
Category:Googol series
Category:Upper class 3