Noventrigintacentillion

A noventrigintacentillion is equal to \(10^{420}\) in the short scale and \(10^{834}\) in the long scale by the and 's naming systemConway and Guy. (1995) "The book of Numbers" Copernicus as it is the 139th -illion number.
In the long scale, \(10^{420}\) is called septuagintillion.
\(10^{420}\) is also called Bentaggoogol 
==Approximations==
For the short scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{420}\) (exact) 	\(1\times10^{420}\) (exact)
Arrow notation 	\(10\uparrow 420\) (exact) 	\(10\uparrow 420\) (exact)
Steinhaus-Moser Notation 	185[3] 	186[3]
Chained arrow notation 	\(10\rightarrow 420\) (exact) 	\(10\rightarrow 420\) (exact)
Taro's multivariable Ackermann function	A(3,1392) 	A(3,1393)
BEAF & Bird's array notation 	{10,420} (exact) 	{10,420} (exact)
Hyper-E notation 	E420 (exact) 	E420 (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)(185) 	m(1)(186)
Bashicu matrix system 	(0)(0)(0)(0)(0)(0)(0)(0)[43] 	(0)(0)(0)(0)(0)(0)(0)(0)[44]
Copy notation 	9[420] 	1[421]
Pound-Star Notation 	#*((39))*13 	#*((40))*13
Hyperfactorial array notation 	219! 	220!
Fast-growing hierarchy 	\(f_2(1384)\) 	\(f_2(1385)\)
Hardy hierarchy 	\(H_{\omega^2}(1384)\) 	\(H_{\omega^2}(1385)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^2 4+\omega 2}}(10)\) (exact)	\(g_{\omega^{\omega^2 4+\omega 2}}(10)\) (exact)
For the long scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{834}\) (exact) 	\(1\times10^{834}\) (exact)
Arrow notation 	\(10\uparrow 834\) (exact) 	\(10\uparrow 834\) (exact)
Steinhaus-Moser Notation 	330[3] 	331[3]
Chained arrow notation 	\(10\rightarrow 834\) (exact) 	\(10\rightarrow 834\) (exact)
Taro's multivariable Ackermann function	A(3,2767) 	A(3,2768)
BEAF & Bird's array notation 	{10,834} (exact) 	{10,834} (exact)
Hyper-E notation 	E834 (exact) 	E834 (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)(330) 	m(1)(331)
Bashicu matrix system 	(0)(0)(0)(0)(0)(0)(0)(0)(0)[42] 	(0)(0)(0)(0)(0)(0)(0)(0)(0)[43]
Fast-growing hierarchy 	\(f_2(2759)\) 	\(f_2(2760)\)
Hardy hierarchy 	\(H_{\omega^2}(2759)\) 	\(H_{\omega^2}(2760)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^2 8+\omega 3+4}}(10)\) (exact)	\(g_{\omega^{\omega^2 8+\omega 3+4}}(10)\) (exact)
== Sources ==
== See also ==
Category:Numbers
Category:Class 2
Category:Illion
Category:Numbers with 101 to 999 digits
Category:Tier 1 -illion numbers