Seseptingentillion

A seseptingentillion is equal to \(10^{2121}\) in the short scale and \(10^{4236}\) in the long scale by the and 's naming systemConway and Guy. (1995) "The book of Numbers" Copernicus as it is the 706th -illion number.
In the long scale, \(10^{2121}\) is called tresquinquagintatrecentilliard.
==Approximations==
For the short scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{2121}\) (exact) 	\(1\times10^{2121}\) (exact)
Arrow notation 	\(10\uparrow 2121\) (exact) 	\(10\uparrow 2121\) (exact)
Steinhaus-Moser Notation 	739[3] 	740[3]
Chained arrow notation 	\(10\rightarrow 2121\) (exact) 	\(10\rightarrow 2121\) (exact)
Taro's multivariable Ackermann function	A(3,7042) 	A(3,7043)
BEAF & Bird's array notation 	{10,2121} (exact) 	{10,2121} (exact)
Hyper-E notation 	E2121 (exact) 	E2121 (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)(739) 	m(1)(740)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(7033)\) 	\(f_2(7034)\)
Hardy hierarchy 	\(H_{\omega^2}(7033)\) 	\(H_{\omega^2}(7034)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3 2+\omega^2+\omega 2+1}}(10)\) (exact)	\(g_{\omega^{\omega^3 2+\omega^2+\omega 2+1}}(10)\) (exact)
For the long scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{4236}\) (exact) 	\(1\times10^{4236}\) (exact)
Arrow notation 	\(10\uparrow 4236\) (exact) 	\(10\uparrow 4236\) (exact)
Steinhaus-Moser Notation 	1352[3] 	1353[3]
Chained arrow notation 	\(10\rightarrow 4236\) (exact) 	\(10\rightarrow 4236\) (exact)
Taro's multivariable Ackermann function	A(3,14068) 	A(3,14069)
BEAF & Bird's array notation 	{10,4236} (exact) 	{10,4236} (exact)
Hyper-E notation 	E4236 (exact) 	E4236 (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)(1352) 	m(1)(1353)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(14057)\) 	\(f_2(14058)\)
Hardy hierarchy 	\(H_{\omega^2}(14057)\) 	\(H_{\omega^2}(14058)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3 4+\omega^2 2+\omega 3+6}}(10)\) (exact)	\(g_{\omega^{\omega^3 4+\omega^2 2+\omega 3+6}}(10)\) (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