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SpongeBob's Number is equal to 29,998,559,671,349. The number appeared in an episode of SpongeBob SquarePants called "Have You Seen This Snail?", where SpongeBob is given a challenge of hitting a paddle ball this many times in a row called "the dirty bubble challenge". The name was coined by Googology Wiki user Cookiefonster. It may be the number of times the paddle ball has to hit the dirty bubble in order to pop him.

Even with a constant 4 hits per second, the challenge would still take a minimum of about 238,000 years.

SpongeBob's Number is a prime number.

## Approximations

Notation Lower bound Upper bound
Scientific notation $$2.999\times10^{13}$$ $$3\times10^{13}$$
Arrow notation $$84\uparrow7$$ $$85\uparrow7$$
Steinhaus-Moser Notation 12 13
Copy notation 2 3
Taro's multivariable Ackermann function A(3,41) A(3,42)
Pound-Star Notation #*(0,2,6)*4 #*(1,2,6)*4
BEAF {84,7} {85,7}
Hyper-E notation 2E13 3E13
Bashicu matrix system (0)(0) (0)(0)
Hyperfactorial array notation 16! 17!
Fast-growing hierarchy $$f_2(39)$$ $$f_2(40)$$
Hardy hierarchy $$H_{\omega^2}(39)$$ $$H_{\omega^2}(40)$$
Slow-growing hierarchy $$g_{\omega^{\omega+3}2+\omega^{\omega+2}9+\omega^{\omega+1}9+\omega^\omega9}(10)$$ $$g_{\omega^{\omega+3}3}(10)$$

## Sources

1. Pointless Gigantic List of Numbers - Part 2
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