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Muryoutaisuu

Japanese characters for muryoutaisuu

Muryoutaisuu (無量大数 written in Japanese, means "large number without measure") is \(10^{68}\) in Japanese counting system[1][2]. It was derived from Chinese counting system, which was derived from Buddism's sutra in India. There are several different versions of counting systems in Chinese, meaning different numbers for the same Chinese character but different pronunciation[3].

It first appeared in Jinkouki (Japanese: 塵劫記) by Mitsuyoshi Yoshida in 1631. In the first edition of Jinkouki published in 1627, numbers up to Fukashigi was defined, and muryoutaisuu did not appear. In the 1631 edition of Jinkouki, definition of Muryoutaisuu was \(10^{88}\), and later in the 1634 edition of Jinkouki, definition changed to \(10^{68}\). Therefore, the definition of Muryoutaisuu is now \(10^{68}\).

In English, it is one hundred thousand vigintillion in short scale and one hundred undecillion in long scale.

The total mass-energy of the observable universe is estimated to be about 130 muryoutaisuu joules.

Sources Edit

  1. Book of Numbers by J.H. Conway and R.K. Guy
  2. 大数の名前
  3. 無量大数の彼方へ

See alsoEdit

Googology in Asia

Fish numbers: Fish number 1 · Fish number 2 · Fish number 3 · Fish number 4 · Fish number 5 · Fish number 6 · Fish number 7
Mapping functions: S map · SS map · S(n) map · M(n) map · M(m,n) map
By Aeton: Okojo numbers · N-growing hierarchy
By BashicuHyudora: Pair sequence number · Bashicu matrix system
Indian counting system: Lakh · Crore
Chinese and Japanese counting system: Wan · Yi · Zhao · Jing · Gai · Zi · Rang · Gou · Jian · Zheng · Zai · Ji · Gougasha · Asougi · Nayuta · Fukashigi · Muryoutaisuu
Buddhist text: Tallakshana · Dvajagravati · Mahakathana · Asankhyeya · Dvajagranisamani · Vahanaprajnapti · Inga · Kuruta · Sarvanikshepa · Agrasara · Uttaraparamanurajahpravesa · Avatamsaka Sutra
Other: Taro's multivariable Ackermann function · Sushi Kokuuhen

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