Dueicosillion

Dueicosillion is equal to \(10^{3\left(10^{66}\right)+3}\) or \(10^{3\text{ unvigintillion }3}\). The term was coined by Aarex Tiaokhiao.
==Approximations==
Notation 	Lower bound 	Upper bound
Arrow notation 	\(1000\uparrow(1+10\uparrow66)\) 	\(1000\uparrow(1+10\uparrow66)\)
Down-arrow notation 	\(1000\downarrow\downarrow23\) 	\(742\downarrow\downarrow24\)
Steinhaus-Moser Notation 	40[3][3] 	41[3][3]
Copy notation 	2[2[67]] 	3[3[67]]
H* function 	H(H(21)) 	H(H(21))
Taro's multivariable Ackermann function	A(3,A(3,219)) 	A(3,A(3,220))
Pound-Star Notation 	#*((1))*(0,5,0,4,1)*5 	#*((1))*(1,5,0,4,1)*5
BEAF 	{1000,1+{10,66}} 	{1000,1+{10,66}}
Hyper-E notation 	E(3+3E66) 	E(3+3E66)
Bashicu matrix system 	(0)(1)[14] 	(0)(1)[15]
Hyperfactorial array notation 	(50!)! 	(51!)!
Fast-growing hierarchy 	\(f_2(f_2(214))\) 	\(f_2(f_2(215))\)
Hardy hierarchy 	\(H_{\omega^22}(214)\) 	\(H_{\omega^22}(215)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^{\omega6+6}3+3}}(10)\)	\(g_{\omega^{\omega^{\omega6+6}3+3}}(10)\)
== Sources ==
Category:Numbers
Category:Illion
Category:Class 3
Category:Greek-based name
Category:Middle class 3
Category:Tier 2 -illion numbers