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A fugahundred is equal to 10010099,[1][2][3] or $$100 \downarrow\downarrow 100$$ in down-arrow notation. It evaluates to:

10010099
= 102*10099
= 102*102*99
= 102*10198

The name is made by applying the fuga- prefix to 100.

## Size

Fugahundred is in the vicinity of a googolplex, though it's actually equal to the 2*1098th power of a googolplex.

## Approximations

Notation Lower bound Upper bound
Arrow notation $$100\uparrow100\uparrow99$$
Steinhaus-Moser Notation 98[3][3] 99[3][3]
Copy notation 1[1[199]] 2[2[199]]
H* function H(666H(64)) H(667H(64))
Taro's multivariable Ackermann function A(3,A(3,657)) A(3,A(3,658))
Pound-Star Notation #*((1))*((36))*7 #*((1))*((37))*7
BEAF {100,{100,99}}
Hyper-E notation E[100]99#2
Bashicu matrix system (0)(1)[25] (0)(1)[26]
Hyperfactorial array notation (118!)! (119!)!
Fast-growing hierarchy $$f_2(f_2(651))$$ $$f_2(f_2(652))$$
Hardy hierarchy $$H_{\omega^22}(651)$$ $$H_{\omega^22}(652)$$
Slow-growing hierarchy $$g_{\omega^{\omega^{99}}}(100)$$

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.