Megafugafive is equal to \(5\uparrow\uparrow5\), or 5 tetrated to 5. It is approximately equal to \(10^{10^{10^{2,184}}}\) or \(E2,184\#3\) in Hyper-E notation.
Googology Wiki user Hyp cos calls this number pentbo, and it's equal to s(5,5,2) in strong array notation.[1]
This number is also equal to s(5,2,3), s(5,2,1,2), and s(5,2{2}2).
Etymology
The name "megafugafive" is formed by adding the megafuga- prefix to 5.
The name "pentbo" is based on the word "penta" (Greek for five), meaning a base-5 number.
Approximations in other notations
| Notation | Approximation |
|---|---|
| Scientific notation | \(10^{10^{1.33574\times10^{2,184}}}\) |
| BEAF | \(\{5,5,2\}\) (exact) |
| Hyper-E notation | \(E(5)1\#5\) (exact) |
| Chained arrow notation | \(5\rightarrow5\rightarrow2\) (exact) |
| Hyperfactorial array notation | \(((870!)!)!\) |
| Fast-growing hierarchy | \(f_2(f_2(f_2(f_2(9))))\) |
| Hardy hierarchy | \(H_{\omega^24}(9)\) |
| Slow-growing hierarchy | \(g_{\varepsilon_0}(5)\) (exact) |
Sources
See also
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
