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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.[1] 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[3] 13[3]
Copy notation 2[14] 3[14]
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)[2340] (0)(0)[2341]
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