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The quinquagintinongentillion is equal to $$10^{2853}$$. The term was coined by Sbiis Saibian. The long scale version of this number is equal to $$10^{5700}$$.

The probability that there is no universal common ancestor of all current life on Earth has been estimated to be 1 in $$10^{2860}$$.

## Approimations

For short scale:

Notation Lower bound Upper bound
Scientific notation $$1\times10^{2853}$$
Arrow notation $$10\uparrow2853$$
Steinhaus-Moser Notation 957 958
Copy notation 9 10
Taro's multivariable Ackermann function A(3,9474) A(3,9475)
Pound-Star Notation #*((7))*30 #*((8))*30
BEAF {10,2853}
Hyper-E notation E2853
Bashicu matrix system (0)(1) (0)(1)
Hyperfactorial array notation 1094! 1095!
Fast-growing hierarchy $$f_2(9464)$$ $$f_2(9465)$$
Hardy hierarchy $$H_{\omega^2}(9464)$$ $$H_{\omega^2}(9465)$$
Slow-growing hierarchy $$g_{\omega^{\omega^32+\omega^28+\omega5+3}}(10)$$

For long scale:

Notation Lower bound Upper bound
Scientific notation $$1\times10^{5700}$$
Arrow notation $$10\uparrow5700$$
Steinhaus-Moser Notation 1756 1757
Copy notation 9 1
Taro's multivariable Ackermann function A(3,18931) A(3,18932)
Pound-Star Notation #*((2357))*40 #*((2358))*40
BEAF {10,5700}
Hyper-E notation E5700
Bashicu matrix system (0)(1) (0)(1)
Hyperfactorial array notation 1989! 1990!
Fast-growing hierarchy $$f_2(18920)$$ $$f_2(18921)$$
Hardy hierarchy $$H_{\omega^2}(18920)$$ $$H_{\omega^2}(18921)$$
Slow-growing hierarchy $$g_{\omega^{\omega^35+\omega^27}}(10)$$

## Sources

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