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The ecetonthrong is equal to 10303,000,000,000, or E303,000,000,000 using Hyper-E notation.[1] The name was coined by Sbiis Saibian. It is equal to 1 followed by 303,000,000,000 zeros. It is 303,000,000,001 digits long.

## Names in -illion systems

In the short scale, it is also called:

one cenmillinovenonagintanongentillion

According to Landon Curt Noll's The English name of a number, ecetonthrong is also known as:

one cenmilliamilliamillianongennovemnonaginmilliamillianongennovemnonaginmillianongennovemnonagintillion

## Approximations

Notation Lower bound Upper bound
Scientific notation $$1\times10^{303000000000}$$
Arrow notation $$10\uparrow303000000000$$
Down-arrow notation $$575\downarrow\downarrow5$$ $$576\downarrow\downarrow5$$
Steinhaus-Moser Notation 10[3][3] 11[3][3]
Copy notation 2[2[12]] 3[3[12]]
H* function H(100H(2)) H(101H(2))
Taro's multivariable Ackermann function A(3,A(3,36)) A(3,A(3,37))
Pound-Star Notation #*((1))*(38)*3 #*((1))*(3)*9
BEAF {10,303000000000}
Bashicu matrix system (0)(1)[6] (0)(1)[7]
Hyperfactorial array notation (13!)! (14!)!
Fast-growing hierarchy $$f_2(f_2(34))$$ $$f_2(f_2(35))$$
Hardy hierarchy $$H_{\omega^22}(34)$$ $$H_{\omega^22}(35)$$
Slow-growing hierarchy $$g_{\omega^{\omega^{\omega+1}3+\omega^93}}(10)$$

## Sources

1. Saibian, Sbiis. Hyper-E Numbers. Retrieved 2016-07-18.

-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)