Unducentillion

An unducentillion is equal to \(10^{606}\) in the short scale and \(10^{1206}\) in the long scale by the and 's naming systemConway and Guy. (1995) "The book of Numbers" Copernicus as it is the 201st -illion number.
In the long scale, \(10^{606}\) is called uncentillion.
ARsygo coined gareceton, referring to the short-scale value of this number, as it is a square of eceton.
==Approximations==
For the short scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{606}\) (exact) 	\(1\times10^{606}\) (exact)
Arrow notation 	\(10\uparrow 606\) (exact) 	\(10\uparrow 606\) (exact)
Steinhaus-Moser Notation 	252[3] 	253[3]
Chained arrow notation 	\(10\rightarrow 606\) (exact) 	\(10\rightarrow 606\) (exact)
Taro's multivariable Ackermann function	A(3,2010) 	A(3,2011)
BEAF & Bird's array notation 	{10,606} (exact) 	{10,606} (exact)
Hyper-E notation 	E606 (exact) 	E606 (exact)
s(n) map 	\(s(1)^3(\lambda x.x+1)(7)\) 	\(s(1)^3(\lambda x.x+1)(8)\)
m(n) map 	m(1)(252) 	m(1)(253)
Bashicu matrix system 	(0)(0)(0)(0)(0)(0)(0)(0)(0)[15] 	(0)(0)(0)(0)(0)(0)(0)(0)(0)[16]
Fast-growing hierarchy 	\(f_2(2002)\) 	\(f_2(2003)\)
Hardy hierarchy 	\(H_{\omega^2}(2002)\) 	\(H_{\omega^2}(2003)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^2 6+6}}(10)\) (exact)	\(g_{\omega^{\omega^2 6+6}}(10)\) (exact)
For the long scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{1206}\) (exact) 	\(1\times10^{1206}\) (exact)
Arrow notation 	\(10\uparrow 1206\) (exact) 	\(10\uparrow 1206\) (exact)
Steinhaus-Moser Notation 	453[3] 	454[3]
Chained arrow notation 	\(10\rightarrow 1206\) (exact) 	\(10\rightarrow 1206\) (exact)
Taro's multivariable Ackermann function	A(3,4003) 	A(3,4004)
BEAF & Bird's array notation 	{10,1206} (exact) 	{10,1206} (exact)
Hyper-E notation 	E1206 (exact) 	E1206 (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)(453) 	m(1)(454)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(3994)\) 	\(f_2(3995)\)
Hardy hierarchy 	\(H_{\omega^2}(3994)\) 	\(H_{\omega^2}(3995)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3+\omega^2 2+6}}(10)\) (exact)	\(g_{\omega^{\omega^3+\omega^2 2+6}}(10)\) (exact)
== Sources ==
== See also ==
Category:Numbers
Category:Class 2
Category:Illion
Category:Numbers with 101 to 999 digits
Category:Powers of 10 with squarefree exponent
Category:Tier 1 -illion numbers