Unsexagintaoctingentillion

An unsexagintaoctingentillion is equal to \(10^{2586}\) in the short scale and \(10^{5166}\) in the long scale by the and 's naming systemConway and Guy. (1995) "The book of Numbers" Copernicus as it is the 861st -illion number.
In the long scale, \(10^{2586}\) is called untrigintaquadringentillion.
==Approximations==
For the short scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{2586}\) (exact) 	\(1\times10^{2586}\) (exact)
Arrow notation 	\(10\uparrow 2586\) (exact) 	\(10\uparrow 2586\) (exact)
Steinhaus-Moser Notation 	878[3] 	879[3]
Chained arrow notation 	\(10\rightarrow 2586\) (exact) 	\(10\rightarrow 2586\) (exact)
Taro's multivariable Ackermann function	A(3,8587) 	A(3,8588)
BEAF & Bird's array notation 	{10,2586} (exact) 	{10,2586} (exact)
Hyper-E notation 	E2586 (exact) 	E2586 (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)(878) 	m(1)(879)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(8577)\) 	\(f_2(8578)\)
Hardy hierarchy 	\(H_{\omega^2}(8577)\) 	\(H_{\omega^2}(8578)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3 2+\omega^2 5+\omega 8+6}}(10)\) (exact)	\(g_{\omega^{\omega^3 2+\omega^2 5+\omega 8+6}}(10)\) (exact)
For the long scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{5166}\) (exact) 	\(1\times10^{5166}\) (exact)
Arrow notation 	\(10\uparrow 5166\) (exact) 	\(10\uparrow 5166\) (exact)
Steinhaus-Moser Notation 	1610[3] 	1611[3]
Chained arrow notation 	\(10\rightarrow 5166\) (exact) 	\(10\rightarrow 5166\) (exact)
Taro's multivariable Ackermann function	A(3,17158) 	A(3,17159)
BEAF & Bird's array notation 	{10,5166} (exact) 	{10,5166} (exact)
Hyper-E notation 	E5166 (exact) 	E5166 (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)(1610) 	m(1)(1611)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(17147)\) 	\(f_2(17148)\)
Hardy hierarchy 	\(H_{\omega^2}(17147)\) 	\(H_{\omega^2}(17148)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3 5+\omega^2+\omega 6+6}}(10)\) (exact)	\(g_{\omega^{\omega^3 5+\omega^2+\omega 6+6}}(10)\) (exact)
== Sources ==
== See also ==
Category:Numbers
Category:Class 2
Category:Illion
Category:Numbers with 1000 to 1000000 digits
Category:Powers of 10 with squarefree exponent
Category:Tier 1 -illion numbers