## FANDOM

10,405 Pages

An unquadragintillion is equal to $$10^{126}$$ or $$10^{246}$$ in France and Germany.[1]

In the long scale which is commonly used in France and Germany, $$10^{126}$$ is called unvigintillion.

10126 is also called kathana.[2]

## Approximations

For short scale:

Notation Lower bound Upper bound
Scientific notation $$1\times10^{126}$$
Arrow notation $$10\uparrow126$$
Steinhaus-Moser Notation 68[3] 69[3]
Copy notation 9[126] 1[127]
Taro's multivariable Ackermann function A(3,415) A(3,416)
Pound-Star Notation #*(0,11,3,10,10,4,8,1)*9 #*(1,11,3,10,10,4,8,1)*9
BEAF {10,126}
Hyper-E notation E126
Bashicu matrix system (0)(0)(0)(0)(0)[8659] (0)(0)(0)(0)(0)[8660]
Hyperfactorial array notation 83! 84!
Fast-growing hierarchy $$f_2(409)$$ $$f_2(410)$$
Hardy hierarchy $$H_{\omega^2}(409)$$ $$H_{\omega^2}(410)$$
Slow-growing hierarchy $$g_{\omega^{\omega^2+\omega2+6}}(10)$$

For long scale:

Notation Lower bound Upper bound
Scientific notation $$1\times10^{246}$$
Arrow notation $$10\uparrow246$$
Steinhaus-Moser Notation 118[3] 119[3]
Copy notation 9[246] 1[247]
Taro's multivariable Ackermann function A(3,814) A(3,815)
Pound-Star Notation #*((387))*10 #*((388))*10
BEAF {10,246}
Hyper-E notation E246
Bashicu matrix system (0)(0)(0)(0)(0)(0)[6978] (0)(0)(0)(0)(0)(0)[6979]
Hyperfactorial array notation 142! 143!
Fast-growing hierarchy $$f_2(807)$$ $$f_2(808)$$
Hardy hierarchy $$H_{\omega^2}(807)$$ $$H_{\omega^2}(808)$$
Slow-growing hierarchy $$g_{\omega^{\omega^22+\omega4+6}}(10)$$

## List of prefixed numbers derived from quadragintillion

Name Short scale Long scale