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Fugaeight is equal to 887,[1][2][3] or $$8 \downarrow \downarrow 8$$ using down-arrow notation. The name is formed by applying the fuga- prefix to 8. It has exactly 1,893,917 digits. It is approximately 9.3843*101,893,916 in scientific notation.

## Approximations

Notation Lower bound Upper bound
Scientific notation $$9.384\times10^{1\,893\,916}$$ $$9.385\times10^{1\,893\,916}$$
Arrow notation $$8\uparrow8\uparrow7$$
Steinhaus-Moser Notation 6[3][3] 7[3][3]
Copy notation 1[1[7]] 2[2[7]]
Taro's multivariable Ackermann function A(3,A(3,19)) A(3,A(3,20))
Pound-Star Notation #*((630285))*569 #*((630286))*569
BEAF {8,{8,7}}
Hyper-E notation E[8]7#2
Bashicu matrix system (0)(1)[4] (0)(1)[5]
Hyperfactorial array notation (9!)! (10!)!
Fast-growing hierarchy $$f_2(f_2(18))$$ $$f_2(f_2(19))$$
Hardy hierarchy $$H_{\omega^22}(18)$$ $$H_{\omega^22}(19)$$
Slow-growing hierarchy $$g_{\omega^{\omega^7}}(8)$$

Gar-: garone · gartwo · garthree · garfour · garfive · garsix · garseven · gareight · garnine · garten · garhundred · gargoogol · gartrialogue · gargoogolplex · gargiggol
Fz-: fzone · fztwo · fzthree · fzfour · fzfive · fzsix · fzseven · fzeight · fznine · fzten · fztwenty · fzhundred · fzthousand · fzmillion · fzgoogol · fzmilliplexion · fzgoogolplex · fzgargoogolplex · fzgargantugoogolplex · fzgiggol
Fuga-: fugaone · fugatwo · fugathree · fugafour · fugafive · fugasix · fugaseven · fugaeight · fuganine · fugaten · fugaeleven · fugahundred · fugagoogol · fugagoogolplex · fugagargoogolplex · fugagargantugoogolplex · fugagiggol
Megafuga-: megafugaone · megafugatwo · megafugathree · megafugafour · megafugafive · megafugasix · megafugaseven · megafugaeight · megafuganine · megafugaten · megafugaeleven · megafugatwelve · megafugathirteen · megafugafourteen · megafugafifteen · megafugasixteen · megafugaseventeen · megafugaeighteen · megafuganineteen · megafugatwenty · megafugathirty · megafugaforty · megafugafifty · megafugasixty · megafugaseventy · megafugaeighty · megafuganinety · megafugahundred · megafugagoogol · megafugagoogolplex · megafugagargoogolplex · megafugagargantugoogolplex
Booga-: boogaone · boogatwo · boogathree · boogafour · boogafive · boogasix · boogaten boogahundred · boogagoogol · boogagoogolplex
Gag: gagone · gagtwo · gagthree · gagfour · gagfive · gagsix · gagseven · gageight · gagnine · gagten · gaggoogol · gaggoogolplex

## Sources

1. Cockburn, Alistair. A fuga really big numbers (archived 2016
2. Saibian, Sbiis. The Fz, The Fuga & The Megafuga. Retrieved 2021-07-24.
3. Cookiefonster. 2.5A. Googological prefixes and suffixes - Pointless Large Number Stuff. Retrieved 2021-07-24.