Unvigintiseptingentillion

An unvigintiseptingentillion is equal to \(10^{2166}\) in the short scale and \(10^{4326}\) in the long scale by the and 's naming systemConway and Guy. (1995) "The book of Numbers" Copernicus as it is the 721st -illion number.
In the long scale, \(10^{2166}\) is called unsexagintatrecentillion.
==Approximations==
For the short scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{2166}\) (exact) 	\(1\times10^{2166}\) (exact)
Arrow notation 	\(10\uparrow 2166\) (exact) 	\(10\uparrow 2166\) (exact)
Steinhaus-Moser Notation 	752[3] 	753[3]
Chained arrow notation 	\(10\rightarrow 2166\) (exact) 	\(10\rightarrow 2166\) (exact)
Taro's multivariable Ackermann function	A(3,7192) 	A(3,7193)
BEAF & Bird's array notation 	{10,2166} (exact) 	{10,2166} (exact)
Hyper-E notation 	E2166 (exact) 	E2166 (exact)
s(n) map 	\(s(1)^3(\lambda x.x+1)(9)\) 	\(s(1)^3(\lambda x.x+1)(10)\)
m(n) map 	m(1)(752) 	m(1)(753)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(7182)\) 	\(f_2(7183)\)
Hardy hierarchy 	\(H_{\omega^2}(7182)\) 	\(H_{\omega^2}(7183)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3 2+\omega^2+\omega 6+6}}(10)\) (exact)	\(g_{\omega^{\omega^3 2+\omega^2+\omega 6+6}}(10)\) (exact)
For the long scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{4326}\) (exact) 	\(1\times10^{4326}\) (exact)
Arrow notation 	\(10\uparrow 4326\) (exact) 	\(10\uparrow 4326\) (exact)
Steinhaus-Moser Notation 	1378[3] 	1379[3]
Chained arrow notation 	\(10\rightarrow 4326\) (exact) 	\(10\rightarrow 4326\) (exact)
Taro's multivariable Ackermann function	A(3,14367) 	A(3,14368)
BEAF & Bird's array notation 	{10,4326} (exact) 	{10,4326} (exact)
Hyper-E notation 	E4326 (exact) 	E4326 (exact)
s(n) map 	\(s(1)^3(\lambda x.x+1)(10)\) 	\(s(1)^3(\lambda x.x+1)(11)\)
m(n) map 	m(1)(1378) 	m(1)(1379)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(14356)\) 	\(f_2(14357)\)
Hardy hierarchy 	\(H_{\omega^2}(14356)\) 	\(H_{\omega^2}(14357)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3 4+\omega^2 3+\omega 2+6}}(10)\) (exact)	\(g_{\omega^{\omega^3 4+\omega^2 3+\omega 2+6}}(10)\) (exact)
== Sources ==
== See also ==
Category:Numbers
Category:Class 2
Category:Illion
Category:Numbers with 1000 to 1000000 digits
Category:Tier 1 -illion numbers