Octonongentillion

An octonongentillion is equal to \(10^{2727}\) in the short scale and \(10^{5448}\) in the long scale by the and 's naming systemConway and Guy. (1995) "The book of Numbers" Copernicus as it is the 908th -illion number.
In the long scale, \(10^{2727}\) is called quattuorquinquagintaquadringentilliard.
==Approximations==
For the short scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{2727}\) (exact) 	\(1\times10^{2727}\) (exact)
Arrow notation 	\(10\uparrow 2727\) (exact) 	\(10\uparrow 2727\) (exact)
Steinhaus-Moser Notation 	920[3] 	921[3]
Chained arrow notation 	\(10\rightarrow 2727\) (exact) 	\(10\rightarrow 2727\) (exact)
Taro's multivariable Ackermann function	A(3,9055) 	A(3,9056)
BEAF & Bird's array notation 	{10,2727} (exact) 	{10,2727} (exact)
Hyper-E notation 	E2727 (exact) 	E2727 (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)(920) 	m(1)(921)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(9045)\) 	\(f_2(9046)\)
Hardy hierarchy 	\(H_{\omega^2}(9045)\) 	\(H_{\omega^2}(9046)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3 2+\omega^2 7+\omega 2+7}}(10)\) (exact)	\(g_{\omega^{\omega^3 2+\omega^2 7+\omega 2+7}}(10)\) (exact)
For the long scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{5448}\) (exact) 	\(1\times10^{5448}\) (exact)
Arrow notation 	\(10\uparrow 5448\) (exact) 	\(10\uparrow 5448\) (exact)
Steinhaus-Moser Notation 	1688[3] 	1689[3]
Chained arrow notation 	\(10\rightarrow 5448\) (exact) 	\(10\rightarrow 5448\) (exact)
Taro's multivariable Ackermann function	A(3,18094) 	A(3,18095)
BEAF & Bird's array notation 	{10,5448} (exact) 	{10,5448} (exact)
Hyper-E notation 	E5448 (exact) 	E5448 (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)(1688) 	m(1)(1689)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(18083)\) 	\(f_2(18084)\)
Hardy hierarchy 	\(H_{\omega^2}(18083)\) 	\(H_{\omega^2}(18084)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3 5+\omega^2 4+\omega 4+8}}(10)\) (exact)	\(g_{\omega^{\omega^3 5+\omega^2 4+\omega 4+8}}(10)\) (exact)
== Sources ==
== See also ==
Category:Numbers
Category:Class 2
Category:Illion
Category:Numbers with 1000 to 1000000 digits
Category:Tier 1 -illion numbers