Sesviginticentillion

A sesviginticentillion is equal to \(10^{381}\) in the short scale and \(10^{756}\) in the long scale by the Conway and Guy's naming system^[1]^[2]^[3]^[4] as it is the 126th -illion number.

In the long scale, \(10^{381}\) is called tresexagintilliard.

Approximations[]

For the short scale:

Notation	Lower bound	Upper bound
Scientific notation	\(1\times10^{381}\) (exact)
Arrow notation	\(10\uparrow 381\) (exact)
Steinhaus-Moser Notation	170[3]	171[3]
Chained arrow notation	\(10\rightarrow 381\) (exact)
Taro's multivariable Ackermann function	A(3,1262)	A(3,1263)
BEAF & Bird's array notation	{10,381} (exact)
Hyper-E notation	E381 (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)(170)	m(1)(171)
Bashicu matrix system	(0)(0)(0)(0)(0)(0)(0)(0)[30]	(0)(0)(0)(0)(0)(0)(0)(0)[31]
Fast-growing hierarchy	\(f_2(1255)\)	\(f_2(1256)\)
Hardy hierarchy	\(H_{\omega^2}(1255)\)	\(H_{\omega^2}(1256)\)
Slow-growing hierarchy	\(g_{\omega^{\omega^2 3+\omega 8+1}}(10)\) (exact)

For the long scale:

Notation	Lower bound	Upper bound
Scientific notation	\(1\times10^{756}\) (exact)
Arrow notation	\(10\uparrow 756\) (exact)
Steinhaus-Moser Notation	304[3]	305[3]
Chained arrow notation	\(10\rightarrow 756\) (exact)
Taro's multivariable Ackermann function	A(3,2508)	A(3,2509)
BEAF & Bird's array notation	{10,756} (exact)
Hyper-E notation	E756 (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)(304)	m(1)(305)
Bashicu matrix system	(0)(0)(0)(0)(0)(0)(0)(0)(0)[29]	(0)(0)(0)(0)(0)(0)(0)(0)(0)[30]
Fast-growing hierarchy	\(f_2(2500)\)	\(f_2(2501)\)
Hardy hierarchy	\(H_{\omega^2}(2500)\)	\(H_{\omega^2}(2501)\)
Slow-growing hierarchy	\(g_{\omega^{\omega^2 7+\omega 5+6}}(10)\) (exact)

Main article: -illion