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The ecetoncrowd is equal to 10308 or E308, using Hyper-E notation.[1] The name was coined by Sbiis Saibian. It is the smallest power of 10 representible in the IEEE double-precision floating point format whose full hexadecimal expansion cannot be used at all as a page title in MediaWiki projects, and is also notable for being the largest power of 10 representible (approximately) in the IEEE double-precision floating point format. It is equal to 100 cenuntillion in short scale. It is 309 digits long.

## Etymology

The 2 parts of the name, "eceton" and "crowd", means 10303 and the suffix -crowd, which multiplies this number by 10^5.

## Approximations

Notation Lower bound Upper bound
Scientific notation $$1\times10^{308}$$
Arrow notation $$10\uparrow308$$
Steinhaus-Moser Notation 142[3] 143[3]
Copy notation 9[308] 1[309]
Chained arrow notation $$10→308$$
Taro's multivariable Ackermann function A(3,1020) A(3,1021)
Pound-Star Notation #*((544))*11 #*((545))*11
BEAF {10,308}
Bashicu matrix system (0)(0)(0)(0)(0)(0)[64938] (0)(0)(0)(0)(0)(0)[64939]
Bird's array notation {10,308}
Hyperfactorial array notation 170! 171!
Strong array notation s(10,308)
Fast-growing hierarchy $$f_2(1\,013)$$ $$f_2(1\,014)$$
Hardy hierarchy $$H_{\omega^2}(1\,013)$$ $$H_{\omega^2}(1\,014)$$
Slow-growing hierarchy $$g_{\omega^{\omega^23+8}}(10)$$

## Sources

1. Saibian, Sbiis. Hyper-E Numbers. Retrieved 2016-05-16.

-minutia group
n-ary numbers with multipliers
Eyelash mite group: eyelash mite-speck · eyelash mite-crumb · eyelash mite-chunk · (binary/ternary/octal)eyelash mite · eyelash mite-bunch · eyelash mite-crowd · eyelash mite-swarm
Dust mite group: dust mite-speck · dust mite-crumb · dust mite-chunk · (binary/ternary/octal)dust mite · dust mite-bunch · dust mite-crowd · dust mite-swarm
Cheese mite group: cheese mite-speck · cheese mite-crumb · cheese mite-chunk · (binary/ternary/octal)cheese mite · cheese mite-bunch · cheese mite-crowd · cheese mite-swarm
Clover mite group: clover mite-speck · clover mite-crumb · clover mite-chunk · (binary/ternary/octal)clover mite · clover mite-bunch · clover mite-crowd · clover mite-swarm
Pipsqueak group: (binary/ternary/octal)pipsqueak
Little squeaker group: (binary/ternary/octal)little squeaker
Small fry group: (binary/ternary/octal)small fry
Guppy group: (binary/ternary/octal)guppyspeck · (binary/ternary/octal)guppycrumb · (binary/ternary/octal)guppychunk · (ternary/quaternary/quinary/duodecimal/hexadecimal/vigesimal/sexagesimal)guppy(bit/byte)
Minnow group: (binary/ternary/octal)minnowspeck · (binary/ternary/octal)minnowcrumb · (binary/ternary/octal)minnowchunk · (ternary)minnow(bit/byte)
Goby group: (binary/ternary/octal)gobyspeck · (binary/ternary/octal)gobycrumb · (binary/ternary/octal)gobychunk · (ternary)goby(bit/byte)