Sesexagintasescentillion

A sesexagintasescentillion is equal to \(10^{2001}\) in the short scale and \(10^{3996}\) in the long scale by the and 's naming systemConway and Guy. (1995) "The book of Numbers" Copernicus as it is the 666th -illion number.
In the long scale, \(10^{2001}\) is called trestrigintatrecentilliard.
==Approximations==
For the short scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{2001}\) (exact) 	\(1\times10^{2001}\) (exact)
Arrow notation 	\(10\uparrow 2001\) (exact) 	\(10\uparrow 2001\) (exact)
Steinhaus-Moser Notation 	702[3] 	703[3]
Chained arrow notation 	\(10\rightarrow 2001\) (exact) 	\(10\rightarrow 2001\) (exact)
Taro's multivariable Ackermann function	A(3,6644) 	A(3,6645)
BEAF & Bird's array notation 	{10,2001} (exact) 	{10,2001} (exact)
Hyper-E notation 	E2001 (exact) 	E2001 (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)(702) 	m(1)(703)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(6634)\) 	\(f_2(6635)\)
Hardy hierarchy 	\(H_{\omega^2}(6634)\) 	\(H_{\omega^2}(6635)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3 2+1}}(10)\) (exact)	\(g_{\omega^{\omega^3 2+1}}(10)\) (exact)
For the long scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{3996}\) (exact) 	\(1\times10^{3996}\) (exact)
Arrow notation 	\(10\uparrow 3996\) (exact) 	\(10\uparrow 3996\) (exact)
Steinhaus-Moser Notation 	1285[3] 	1286[3]
Chained arrow notation 	\(10\rightarrow 3996\) (exact) 	\(10\rightarrow 3996\) (exact)
Taro's multivariable Ackermann function	A(3,13271) 	A(3,13272)
BEAF & Bird's array notation 	{10,3996} (exact) 	{10,3996} (exact)
Hyper-E notation 	E3996 (exact) 	E3996 (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)(1285) 	m(1)(1286)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(13260)\) 	\(f_2(13261)\)
Hardy hierarchy 	\(H_{\omega^2}(13260)\) 	\(H_{\omega^2}(13261)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3 3+\omega^2 9+\omega 9+6}}(10)\) (exact)	\(g_{\omega^{\omega^3 3+\omega^2 9+\omega 9+6}}(10)\) (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