Septencentillion

A septencentillion is equal to \(10^{324}\) in the short scale and \(10^{642}\) in the long scale by Conway and Guy's naming systemConway and Guy. (1995) "The book of Numbers" Copernicus as it is the 107th -illion number.
In the long scale, \(10^{324}\) is called quattuorquinquagintillion.
==Approximations==
For the short scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{324}\) 	\(1\times10^{324}\)
Arrow notation 	\(10\uparrow 324\) 	\(10\uparrow 324\)
Taro's multivariable Ackermann function	A(3,1073) 	A(3,1074)
BEAF 	{10,324} 	{10,324}
Hyper-E notation 	E324 	E324
Fast-growing hierarchy 	\(f_2(1066)\) 	\(f_2(1067)\)
Hardy hierarchy 	\(H_{\omega^2}(1066)\)	\(H_{\omega^2}(1067)\)
For the long scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{642}\) 	\(1\times10^{642}\)
Arrow notation 	\(10\uparrow 642\) 	\(10\uparrow 642\)
Taro's multivariable Ackermann function	A(3,2129) 	A(3,2130)
BEAF 	{10,642} 	{10,642}
Hyper-E notation 	E642 	E642
Fast-growing hierarchy 	\(f_2(2121)\) 	\(f_2(2122)\)
Hardy hierarchy 	\(H_{\omega^2}(2121)\)	\(H_{\omega^2}(2122)\)
== Sources ==
== See also ==
Category:Numbers
Category:Class 2
Category:Illion
Category:Numbers with 101 to 999 digits
Category:Tier 1 -illion numbers