Unquinquagintaoctingentillion

An unquinquagintaoctingentillion is equal to \(10^{2556}\) in the short scale and \(10^{5106}\) in the long scale by the and 's naming systemConway and Guy. (1995) "The book of Numbers" Copernicus as it is the 851st -illion number.
In the long scale, \(10^{2556}\) is called sesvigintiquadringentillion.
==Approximations==
For the short scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{2556}\) (exact) 	\(1\times10^{2556}\) (exact)
Arrow notation 	\(10\uparrow 2556\) (exact) 	\(10\uparrow 2556\) (exact)
Steinhaus-Moser Notation 	869[3] 	870[3]
Chained arrow notation 	\(10\rightarrow 2556\) (exact) 	\(10\rightarrow 2556\) (exact)
Taro's multivariable Ackermann function	A(3,8487) 	A(3,8488)
BEAF & Bird's array notation 	{10,2556} (exact) 	{10,2556} (exact)
Hyper-E notation 	E2556 (exact) 	E2556 (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)(869) 	m(1)(870)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(8477)\) 	\(f_2(8478)\)
Hardy hierarchy 	\(H_{\omega^2}(8477)\) 	\(H_{\omega^2}(8478)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3 2+\omega^2 5+\omega 5+6}}(10)\) (exact)	\(g_{\omega^{\omega^3 2+\omega^2 5+\omega 5+6}}(10)\) (exact)
For the long scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{5106}\) (exact) 	\(1\times10^{5106}\) (exact)
Arrow notation 	\(10\uparrow 5106\) (exact) 	\(10\uparrow 5106\) (exact)
Steinhaus-Moser Notation 	1594[3] 	1595[3]
Chained arrow notation 	\(10\rightarrow 5106\) (exact) 	\(10\rightarrow 5106\) (exact)
Taro's multivariable Ackermann function	A(3,16958) 	A(3,16959)
BEAF & Bird's array notation 	{10,5106} (exact) 	{10,5106} (exact)
Hyper-E notation 	E5106 (exact) 	E5106 (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)(1594) 	m(1)(1595)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(16947)\) 	\(f_2(16948)\)
Hardy hierarchy 	\(H_{\omega^2}(16947)\) 	\(H_{\omega^2}(16948)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3 5+\omega^2+6}}(10)\) (exact)	\(g_{\omega^{\omega^3 5+\omega^2+6}}(10)\) (exact)
== Sources ==
== See also ==
Category:Numbers
Category:Class 2
Category:Illion
Category:Numbers with 1000 to 1000000 digits
Category:Tier 1 -illion numbers