Unnonagintaoctingentillion

An unnonagintaoctingentillion is equal to \(10^{2676}\) in the short scale and \(10^{5346}\) in the long scale by the and 's naming systemConway and Guy. (1995) "The book of Numbers" Copernicus as it is the 891st -illion number.
In the long scale, \(10^{2676}\) is called sesquadragintaquadringentillion.
==Approximations==
For the short scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{2676}\) (exact) 	\(1\times10^{2676}\) (exact)
Arrow notation 	\(10\uparrow 2676\) (exact) 	\(10\uparrow 2676\) (exact)
Steinhaus-Moser Notation 	905[3] 	906[3]
Chained arrow notation 	\(10\rightarrow 2676\) (exact) 	\(10\rightarrow 2676\) (exact)
Taro's multivariable Ackermann function	A(3,8886) 	A(3,8887)
BEAF & Bird's array notation 	{10,2676} (exact) 	{10,2676} (exact)
Hyper-E notation 	E2676 (exact) 	E2676 (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)(905) 	m(1)(906)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(8876)\) 	\(f_2(8877)\)
Hardy hierarchy 	\(H_{\omega^2}(8876)\) 	\(H_{\omega^2}(8877)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3 2+\omega^2 6+\omega 7+6}}(10)\) (exact)	\(g_{\omega^{\omega^3 2+\omega^2 6+\omega 7+6}}(10)\) (exact)
For the long scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{5346}\) (exact) 	\(1\times10^{5346}\) (exact)
Arrow notation 	\(10\uparrow 5346\) (exact) 	\(10\uparrow 5346\) (exact)
Steinhaus-Moser Notation 	1660[3] 	1661[3]
Chained arrow notation 	\(10\rightarrow 5346\) (exact) 	\(10\rightarrow 5346\) (exact)
Taro's multivariable Ackermann function	A(3,17756) 	A(3,17757)
BEAF & Bird's array notation 	{10,5346} (exact) 	{10,5346} (exact)
Hyper-E notation 	E5346 (exact) 	E5346 (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)(1660) 	m(1)(1661)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(17744)\) 	\(f_2(17745)\)
Hardy hierarchy 	\(H_{\omega^2}(17744)\) 	\(H_{\omega^2}(17745)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3 5+\omega^2 3+\omega 4+6}}(10)\) (exact)	\(g_{\omega^{\omega^3 5+\omega^2 3+\omega 4+6}}(10)\) (exact)
== Sources ==
== See also ==
Category:Numbers
Category:Class 2
Category:Illion
Category:Numbers with 1000 to 1000000 digits
Category:Tier 1 -illion numbers