Unquinquagintaducentillion

An unquinquagintaducentillion is equal to \(10^{756}\) in the short scale and \(10^{1506}\) in the long scale by the and 's naming systemConway and Guy. (1995) "The book of Numbers" Copernicus as it is the 251st -illion number.
In the long scale, \(10^{756}\) is called sesviginticentillion.
==Approximations==
For the short scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{756}\) (exact) 	\(1\times10^{756}\) (exact)
Arrow notation 	\(10\uparrow 756\) (exact) 	\(10\uparrow 756\) (exact)
Steinhaus-Moser Notation 	304[3] 	305[3]
Chained arrow notation 	\(10\rightarrow 756\) (exact) 	\(10\rightarrow 756\) (exact)
Taro's multivariable Ackermann function	A(3,2508) 	A(3,2509)
BEAF & Bird's array notation 	{10,756} (exact) 	{10,756} (exact)
Hyper-E notation 	E756 (exact) 	E756 (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)(304) 	m(1)(305)
Bashicu matrix system 	(0)(0)(0)(0)(0)(0)(0)(0)(0)[29] 	(0)(0)(0)(0)(0)(0)(0)(0)(0)[30]
Fast-growing hierarchy 	\(f_2(2500)\) 	\(f_2(2501)\)
Hardy hierarchy 	\(H_{\omega^2}(2500)\) 	\(H_{\omega^2}(2501)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^2 7+\omega 5+6}}(10)\) (exact)	\(g_{\omega^{\omega^2 7+\omega 5+6}}(10)\) (exact)
For the long scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{1506}\) (exact) 	\(1\times10^{1506}\) (exact)
Arrow notation 	\(10\uparrow 1506\) (exact) 	\(10\uparrow 1506\) (exact)
Steinhaus-Moser Notation 	549[3] 	550[3]
Chained arrow notation 	\(10\rightarrow 1506\) (exact) 	\(10\rightarrow 1506\) (exact)
Taro's multivariable Ackermann function	A(3,4999) 	A(3,5000)
BEAF & Bird's array notation 	{10,1506} (exact) 	{10,1506} (exact)
Hyper-E notation 	E1506 (exact) 	E1506 (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)(549) 	m(1)(550)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(4990)\) 	\(f_2(4991)\)
Hardy hierarchy 	\(H_{\omega^2}(4990)\) 	\(H_{\omega^2}(4991)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3+\omega^2 5+6}}(10)\) (exact)	\(g_{\omega^{\omega^3+\omega^2 5+6}}(10)\) (exact)
== Sources ==
== See also ==
Category:Numbers
Category:Class 2
Category:Illion
Category:Numbers with 101 to 999 digits
Category:Tier 1 -illion numbers