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"Gootol" redirects here. It is not to be confused with gootrol or gooctol.
"Goozol" redirects here. It is not to be confused with gozzol.
"Goodol (SeveralLegend9998)" redirects here. For other uses, see Goodol (Disambiguation).

One thousand is a number equal to 1,000, or 103.[1][2] It is also equal to the square root of one million. The term came from Old English "þusend," from Proto-Germanic "thusundi", which was likely an indefinite number meaning "many".[3] A thousand is used as a base in the widely used -illion naming system, since all -illions are powers of a thousand.

One thousand sheets of paper is called a bundle.[4]

## Example

Below are one thousand copies of the letter A.

A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A

## In googology

In Greek-based number-naming systems, thousand is associated with SI prefix kilo-, and with SI prefix milli- in Latin systems.

Aarex Tiaokhiao calls this number toorol, 3-noogol[5].

CompactStar (formerly known as Nirvana Supermind) calls this number zeroogol , and it's equal to Q<10,100> in Quick array notation[6]. In addition, CompactStar coined goozol (Not to be confused with gozzol) for this number again, and it's equal to 10<0>100 in the fast array notation.[7]

Wikia user NumLynx gave the name triaplex for this number, coined in analogy to the trialogue.[8]

Username5243 calls this number niloogol or gootol, and it's equal to 10[0]100 = 10[1]3 in Username5243's Array Notation.[9]

BlankEntity calls this number Koogol.[10]

DeepLineMadom calls the number boogol, and is equal to 10[2]100 in DeepLineMadom's Array Notation[11]. It is not to be confused with the much larger Bowers' boogol, which is {10,10,100} in BEAF, or $$10 \uparrow^{100} 10$$ in arrow notation.

SeveralLegend9998 calls this number goodol, and it's equal to 10(1)100 in Hyperdimensional Array Notation.[12]

## Currency-related use

Some currencies, such as the Japanese yen and the Swiss franc, have banknotes with this number in the denomination.

Some currencies, such as the Indonesian rupiah and the Paraguayan guaraní, have coins with this number in the denomination.

It is also the prize for correctly answering the first five questions in some national editions of the game show Who Wants to Be a Millionaire? in the respective local currency, and the prize for correctly answering the first six questions in the German game show Wer wird Millionär? in euros.

Furthermore, it is also the prize for correctly answering the first question in the Indian game show Kaun Banega Crorepati in Indian rupees.

## In other languages

Language(s) Name
Afrikaans duisend
Albanian mijë
Aragonese, Asturian, Breton, Catalan, Esperanto, Friulian, Galician, Ido, Mirandese, Novial, Portuguese, Spanish, Volapük, Welsh mil
Aromanian njilje
Azeri min
Basque mila
Cebuano, Tagalog libo
Corsican, French, Interlingua, Italian, Latin mille
Crimean Tatar miñ
Czech, Slovak tisíc
Danish tusind, tusinde
Dutch duizend
Estonian, Finnish tuhat
Faroese túsund
Fijian udolu
German tausend
Greenlandic tuusinti
Guaraní su
Hawaiian kaukani
Hungarian ezer
Icelandic þúsund
Indonesian, Malay ribu
Interlingue mill
Irish míle
Latvian tūkstotis
Lithuanian tūkstantis
Lojban kilto
Luxembourgish dausend
Maltese elf
Maore Comorian alifu
Maori mano
Northern Sami duhat
Norwegian, Swedish tusen
Occitan mil, mila
Polish tysiąc
Quechua waranqa
Romanian mie
Romansch milli
Sardinian mila, milla, milli, miza, mizi
Scottish Gaelic mìle
Sicilian middi, milli
Slovene tisoč
Sorbian tysac
Spanish mil
Swahili elfu
Turkish bin
Turkmen müň
Uzbek ming
Vietnamese ngàn, nghìn

### Cyrillic alphabets

Language(s) Name
Bashkir, Tatar мең
Belarusian, Russian тысяча
Bulgarian хиляда
Chuvash пин
Kazakh мың
Khakas, Shor, Tuvan муң
Komi-Permyak, Udmurt сюрс
Kyrgyz миң
Macedonian илјада
Mongolian мянга
Old Church Slavonic тысѧща, тысѫща
Serbo-Croatian тисућа, хиљада
Tajik, Yagnobi ҳазор
Ukrainian тисяча

### Other alphabets

Language(s) Name
Ancient Greek χίλιοι
Armenian հազար
Georgian ათასი
Modern Greek χίλια

### Brahmic scripts

Language(s) Name
Bengali হাজার, সহস্র
Hindi हज़ार, सहस्र
Tamil ஆயிரம்
Thai พัน

### In CJK languages

Language(s) Name
Hanzi, Kanji, Hanja 千, 仟
Cantonese (yat1) cin1
Japanese せん (sen)
Korean 천 (cheon, ch’ŏn)
Mandarin qiān

### In RTL languages

Language(s) Name
Arabic أَلْف
Dhivehi ހާސް
Hebrew אֶלֶף
Kurdish هه‌زار
Ottoman Turkish بیك
Pashto زر
Persian هِزار
Urdu ہزار
Uyghur مىڭ
Yiddish טויזנט

## Approximations

Notation Lower bound Upper bound
Scientific notation $$1\times10^3$$
Arrow notation $$10\uparrow3$$
Steinhaus-Moser Notation 4[3] 5[3]
Copy notation 9[3] 10[2]
Chained arrow notation $$10\rightarrow3$$
Taro's multivariable Ackermann function A(3,7) A(3,8)
Pound-Star Notation #*(2)*7 #*(2)*8
PlantStar's Debut Notation [1] [2]
BEAF {10,3}
Hyper-E notation E3
Bashicu matrix system (0)[31] (0)[32]
Hyperfactorial array notation 6! 7!
Bird's array notation {10,3}
Strong array notation s(10,3)
Fast-growing hierarchy $$f_2(7)$$ $$f_2(8)$$
Hardy hierarchy $$H_{\omega^2}(7)$$ $$H_{\omega^2}(8)$$
Slow-growing hierarchy $$g_{\omega^3}(10)$$

## Sources

Higher basic series
2-entry series
Linear series
Two-row series

Note: The readers should be careful that numbers defined by Username5243's Array Notation are ill-defined as explained in Username5243's Array Notation#Issues. So, when an article refers to a number defined by the notation, it actually refers to an intended value, not an actual value itself (for example, a[c]b = $$a \uparrow^c b$$ in arrow notation). In addition, even if the notation is ill-defined, a class category should be based on an intended value when listed, not an actual value itself, as it is not hard to fix all the issues from the original definition, hence it should not be removed.