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An unoctogintillion is equal to 10246 in the short scale, or 10486 in the long scale by Conway and Guy's naming system.[1][2][3][4]

In the long scale which is commonly used in France and Germany, 10246 is called unquadragintillion.

SuperJedi224 calls this number (in short scale) ter-tritillion[5].

Approximations[]

For short scale:

Notation Lower bound Upper bound
Scientific notation \(1\times10^{246}\)
Arrow notation \(10\uparrow246\)
Steinhaus-Moser Notation 118[3] 119[3]
Copy notation 9[246] 1[247]
Taro's multivariable Ackermann function A(3,814) A(3,815)
Pound-Star Notation #*((387))*10 #*((388))*10
BEAF {10,246}
Hyper-E notation E246
Bashicu matrix system (0)(0)(0)(0)(0)(0)[6978] (0)(0)(0)(0)(0)(0)[6979]
Hyperfactorial array notation 142! 143!
Fast-growing hierarchy \(f_2(807)\) \(f_2(808)\)
Hardy hierarchy \(H_{\omega^2}(807)\) \(H_{\omega^2}(808)\)
Slow-growing hierarchy \(g_{\omega^{\omega^22+\omega4+6}}(10)\)

For long scale:

Notation Lower bound Upper bound
Scientific notation \(1\times10^{486}\)
Arrow notation \(10\uparrow486\)
Steinhaus-Moser Notation 209[3] 210[3]
Copy notation 9[486] 1[487]
Taro's multivariable Ackermann function A(3,1611) A(3,1612)
Pound-Star Notation #*((12))*14 #*((13))*14
BEAF {10,486}
Hyper-E notation E486
Bashicu matrix system (0)(0)(0)(0)(0)(0)(0)[6264] (0)(0)(0)(0)(0)(0)(0)[6265]
Hyperfactorial array notation 247! 248!
Fast-growing hierarchy \(f_2(1603)\) \(f_2(1604)\)
Hardy hierarchy \(H_{\omega^2}(1603)\) \(H_{\omega^2}(1604)\)
Slow-growing hierarchy \(g_{\omega^{\omega^24+\omega8+6}}(10)\)

List of prefixed numbers derived from octogintillion[]

Name Short scale Long scale
unoctogintillion 10246 10486
duooctogintillion 10249 10492
tresoctogintillion 10252 10498
quattuoroctogintillion 10255 10504
quinoctogintillion 10258 10510
sexoctogintillion 10261 10516
septemoctogintillion 10264 10522
octooctogintillion 10267 10528
novemoctogintillion 10270 10534

Sources[]

  1. Conway and Guy. (1995) "The book of Numbers" Copernicus
  2. Munafo, Robert. The Conway-Wechsler System. Retrieved 2023-02-05.
  3. Olsen, Steve. Big-Ass Numbers. Retrieved 2023-02-05.
  4. Fish. Conway's zillion numbers. Retrieved 2023-02-05.
  5. -Illions - Almost Infinite

See also[]

Main article: -illion
1–9: million · billion · trillion · quadr · quint · sext · sept · oct · non
10–19: decillion · undec · duodec · tredec · quattuordec · quindec · sexdec · septendec · octodec · novemdec
20–29: vigintillion · unvigint · duovigint · tresvigint · quattuorvigint · quinvigint · sesvigint · septemvigint · octovigint · novemvigint
30–39: trigintillion (un- · duo- · tres- · quattuor- · quin- · ses- · septen- · octo- · noven-)
40–49: quadragintillion (un- · duo- · tres- · quattuor- · quin- · ses- · septen- · octo- · noven-)
50–59: quinquagintillion (un- · duo- · tres- · quattuor- · quin- · ses- · septen- · octo- · noven-)
60–69: sexagintillion (un- · duo- · tre- · quattuor- · quin- · se- · septen- · octo- · noven-)
70–79: septuagintillion (un- · duo- · tre- · quattuor- · quin- · se- · septen- · octo- · noven-)
80–89: octogintillion (un- · duo- · tres- · quattuor- · quin- · sex- · septem- · octo- · novem-)
90–99: nonagintillion (un- · duo- · tre- · quattuor- · quin- · se- · septe- · octo- · nove-)
100–900: centillion · ducent · trecent · quadringent · quingent · sescent · septingent · octingent · nongent
1,000–1024: millillion · dumill · dumillinonagintanongent · trimill · trimilliduotrigintatrecent · trimillisexoctogintaoctingent · quadrimill · quadrimilliquattuordecicent · quinmill · sexmill · septimill · octimill · nonimill · myr · decimilliquinsexagintasescent · dumyr · unquadragintamilliunquinquagintacent · centimill · micr · nan · pic · femt · att · zept · yoct
Numbers By SuperJedi224

Fibonacci Numbers

Pound-Star Notation

Based on the Faxul

Googovipleccix family

Graham Sequence Numbers

-Illion numbers

"-Illion" numbers by SuperJedi224

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