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A quinseptuagintillion is equal to 10228 in America, or 10450 in France and Germany.[1]

In the long scale which is commonly used in France and Germany, 10228 is called octotrigintillion.

## Approximations

For short scale:

Notation Lower bound Upper bound
Scientific notation $$1\times10^{228}$$
Arrow notation $$10\uparrow228$$
Steinhaus-Moser Notation 111[3] 112[3]
Copy notation 9[228] 1[229]
Taro's multivariable Ackermann function A(3,754) A(3,755)
Pound-Star Notation #*((43))*10 #*((44))*10
BEAF {10,228}
Hyper-E notation E228
Bashicu matrix system (0)(0)(0)(0)(0)(0)[3651] (0)(0)(0)(0)(0)(0)[3652]
Hyperfactorial array notation 133! 134!
Fast-growing hierarchy $$f_2(747)$$ $$f_2(748)$$
Hardy hierarchy $$H_{\omega^2}(747)$$ $$H_{\omega^2}(748)$$
Slow-growing hierarchy $$g_{\omega^{\omega^22+\omega2+8}}(10)$$

For long scale:

Notation Lower bound Upper bound
Scientific notation $$1\times10^{450}$$
Arrow notation $$10\uparrow450$$
Steinhaus-Moser Notation 196[3] 197[3]
Copy notation 9[450] 1[451]
Taro's multivariable Ackermann function A(3,1491) A(3,1492)
Pound-Star Notation #*((626))*13 #*((627))*13
BEAF {10,450}
Hyper-E notation E450
Bashicu matrix system (0)(0)(0)(0)(0)(0)(0)[3278] (0)(0)(0)(0)(0)(0)(0)[3279]
Hyperfactorial array notation 232! 233!
Fast-growing hierarchy $$f_2(1484)$$ $$f_2(1485)$$
Hardy hierarchy $$H_{\omega^2}(1484)$$ $$H_{\omega^2}(1485)$$
Slow-growing hierarchy $$g_{\omega^{\omega^24+\omega5}}(10)$$

## List of prefixed numbers derived from septuagintillion

Name Short scale Long scale
unseptuagintillion 10216 10426
duoseptuagintillion 10219 10432
treseptuagintillion 10222 10438
quattuorseptuagintillion 10225 10444
quinseptuagintillion 10228 10450
sexseptuagintillion 10231 10456
septenseptuagintillion 10234 10462
octoseptuagintillion 10237 10468
novemseptuagintillion 10240 10474