Unseptingentillion

An unseptingentillion is equal to \(10^{2106}\) in the short scale and \(10^{4206}\) in the long scale by the and 's naming systemConway and Guy. (1995) "The book of Numbers" Copernicus as it is the 701st -illion number.
In the long scale, \(10^{2106}\) is called unquinquagintatrecentillion.
==Approximations==
For the short scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{2106}\) (exact) 	\(1\times10^{2106}\) (exact)
Arrow notation 	\(10\uparrow 2106\) (exact) 	\(10\uparrow 2106\) (exact)
Steinhaus-Moser Notation 	734[3] 	735[3]
Chained arrow notation 	\(10\rightarrow 2106\) (exact) 	\(10\rightarrow 2106\) (exact)
Taro's multivariable Ackermann function	A(3,6992) 	A(3,6993)
BEAF & Bird's array notation 	{10,2106} (exact) 	{10,2106} (exact)
Hyper-E notation 	E2106 (exact) 	E2106 (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)(734) 	m(1)(735)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(6983)\) 	\(f_2(6984)\)
Hardy hierarchy 	\(H_{\omega^2}(6983)\) 	\(H_{\omega^2}(6984)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3 2+\omega^2+6}}(10)\) (exact)	\(g_{\omega^{\omega^3 2+\omega^2+6}}(10)\) (exact)
For the long scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{4206}\) (exact) 	\(1\times10^{4206}\) (exact)
Arrow notation 	\(10\uparrow 4206\) (exact) 	\(10\uparrow 4206\) (exact)
Steinhaus-Moser Notation 	1344[3] 	1345[3]
Chained arrow notation 	\(10\rightarrow 4206\) (exact) 	\(10\rightarrow 4206\) (exact)
Taro's multivariable Ackermann function	A(3,13969) 	A(3,13970)
BEAF & Bird's array notation 	{10,4206} (exact) 	{10,4206} (exact)
Hyper-E notation 	E4206 (exact) 	E4206 (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)(1344) 	m(1)(1345)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(13958)\) 	\(f_2(13959)\)
Hardy hierarchy 	\(H_{\omega^2}(13958)\) 	\(H_{\omega^2}(13959)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3 4+\omega^2 2+6}}(10)\) (exact)	\(g_{\omega^{\omega^3 4+\omega^2 2+6}}(10)\) (exact)
== Sources ==
== See also ==
Category:Numbers
Category:Class 2
Category:Illion
Category:Numbers with 1000 to 1000000 digits
Category:Tier 1 -illion numbers