Septenquinquagintasescentillion

A septenquinquagintasescentillion is equal to \(10^{1974}\) in the short scale and \(10^{3942}\) in the long scale by the and 's naming systemConway and Guy. (1995) "The book of Numbers" Copernicus as it is the 657th -illion number.
In the long scale, \(10^{1974}\) is called novemvigintitrecentillion.
==Approximations==
For the short scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{1974}\) (exact) 	\(1\times10^{1974}\) (exact)
Arrow notation 	\(10\uparrow 1974\) (exact) 	\(10\uparrow 1974\) (exact)
Steinhaus-Moser Notation 	694[3] 	695[3]
Chained arrow notation 	\(10\rightarrow 1974\) (exact) 	\(10\rightarrow 1974\) (exact)
Taro's multivariable Ackermann function	A(3,6554) 	A(3,6555)
BEAF & Bird's array notation 	{10,1974} (exact) 	{10,1974} (exact)
Hyper-E notation 	E1974 (exact) 	E1974 (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)(694) 	m(1)(695)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(6544)\) 	\(f_2(6545)\)
Hardy hierarchy 	\(H_{\omega^2}(6544)\) 	\(H_{\omega^2}(6545)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3+\omega^2 9+\omega 7+4}}(10)\) (exact)	\(g_{\omega^{\omega^3+\omega^2 9+\omega 7+4}}(10)\) (exact)
For the long scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{3942}\) (exact) 	\(1\times10^{3942}\) (exact)
Arrow notation 	\(10\uparrow 3942\) (exact) 	\(10\uparrow 3942\) (exact)
Steinhaus-Moser Notation 	1270[3] 	1271[3]
Chained arrow notation 	\(10\rightarrow 3942\) (exact) 	\(10\rightarrow 3942\) (exact)
Taro's multivariable Ackermann function	A(3,13092) 	A(3,13093)
BEAF & Bird's array notation 	{10,3942} (exact) 	{10,3942} (exact)
Hyper-E notation 	E3942 (exact) 	E3942 (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)(1270) 	m(1)(1271)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(13081)\) 	\(f_2(13082)\)
Hardy hierarchy 	\(H_{\omega^2}(13081)\) 	\(H_{\omega^2}(13082)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3 3+\omega^2 9+\omega 4+2}}(10)\) (exact)	\(g_{\omega^{\omega^3 3+\omega^2 9+\omega 4+2}}(10)\) (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