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A googolchime (also called guppybell or googillion) is defined by Sbiis Saibian as equal to 101,000 or 1 followed by one thousand zeros.[1][2] It is equal to the tenth power of a googol or googol^10. Yottatron coined the term "MaximusThousand" for this number.[3] This number can be called (in -illion numbers-naming system) ten duotrigintatrecentillion in short scale and ten sesexagintacentilliard in long scale. It is 1001 digits long.

Written in full, a googolchime is equal to:

10,000,000,000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

A googolchime is the same value as Joyce's definition of "great googol".

Aarex Tiaokhiao calls this number unoothol, doohol, or 1,000-noogol.[4]

Username5243 calls this number goomol, niloogolunex or gootolplex, and it's equal to 10[1]1,000 = 10[1]10[1]3 in Username5243's Array Notation.[5]

Googolchime is also known as "ten trecenduotrigintillion" according to Landon Curt Noll's The English name of a number.

## Approximations in other notations

Notation Lower bound Upper bound
Scientific notation $$1\times10^{1000}$$
Arrow notation $$10\uparrow1000$$
Steinhaus-Moser Notation 386[3] 387[3]
Copy notation 9[1000] 1[1001]
Chained arrow notation $$10\rightarrow1000$$
Taro's multivariable Ackermann function A(3,3318) A(3,3319)
Pound-Star Notation #*((15))*19 #*((16))*19
BEAF {10,1000}
Bashicu matrix system (0)(1)[3] (0)(1)[4]
Hyperfactorial array notation 449! 450!
Fast-growing hierarchy $$f_2(3310)$$ $$f_2(3311)$$
Hardy hierarchy $$H_{\omega^2}(3310)$$ $$H_{\omega^2}(3311)$$
Slow-growing hierarchy $$g_{\omega^{\omega^3}}(10)$$

## Sources

-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)