Unquadringentillion

An unquadringentillion is equal to \(10^{1206}\) in the short scale and \(10^{2406}\) in the long scale by the and 's naming systemConway and Guy. (1995) "The book of Numbers" Copernicus as it is the 401st -illion number.
In the long scale, \(10^{1206}\) is called unducentillion.
==Approximations==
For the short scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{1206}\) (exact) 	\(1\times10^{1206}\) (exact)
Arrow notation 	\(10\uparrow 1206\) (exact) 	\(10\uparrow 1206\) (exact)
Steinhaus-Moser Notation 	453[3] 	454[3]
Chained arrow notation 	\(10\rightarrow 1206\) (exact) 	\(10\rightarrow 1206\) (exact)
Taro's multivariable Ackermann function	A(3,4003) 	A(3,4004)
BEAF & Bird's array notation 	{10,1206} (exact) 	{10,1206} (exact)
Hyper-E notation 	E1206 (exact) 	E1206 (exact)
s(n) map 	\(s(1)^3(\lambda x.x+1)(8)\) 	\(s(1)^3(\lambda x.x+1)(9)\)
m(n) map 	m(1)(453) 	m(1)(454)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(3994)\) 	\(f_2(3995)\)
Hardy hierarchy 	\(H_{\omega^2}(3994)\) 	\(H_{\omega^2}(3995)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3+\omega^2 2+6}}(10)\) (exact)	\(g_{\omega^{\omega^3+\omega^2 2+6}}(10)\) (exact)
For the long scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{2406}\) (exact) 	\(1\times10^{2406}\) (exact)
Arrow notation 	\(10\uparrow 2406\) (exact) 	\(10\uparrow 2406\) (exact)
Steinhaus-Moser Notation 	824[3] 	825[3]
Chained arrow notation 	\(10\rightarrow 2406\) (exact) 	\(10\rightarrow 2406\) (exact)
Taro's multivariable Ackermann function	A(3,7989) 	A(3,7990)
BEAF & Bird's array notation 	{10,2406} (exact) 	{10,2406} (exact)
Hyper-E notation 	E2406 (exact) 	E2406 (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)(824) 	m(1)(825)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(7979)\) 	\(f_2(7980)\)
Hardy hierarchy 	\(H_{\omega^2}(7979)\) 	\(H_{\omega^2}(7980)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3 2+\omega^2 4+6}}(10)\) (exact)	\(g_{\omega^{\omega^3 2+\omega^2 4+6}}(10)\) (exact)
== Sources ==
== See also ==
Category:Numbers
Category:Class 2
Category:Illion
Category:Numbers with 1000 to 1000000 digits
Category:Tier 1 -illion numbers