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quadragintacentillion is equal to \(10^{423}\) in the short scale and \(10^{840}\) in the long scale by the Conway and Guy's naming system[1][2][3][4] or with Cookiefonster's extension of Jonathan Bowers system[5] as it is the 140th -illion number.

In the long scale, \(10^{423}\) is called septuagintilliard.

Approximations[]

For the short scale:

Notation Lower bound Upper bound
Scientific notation \(1\times10^{423}\) (exact)
Arrow notation \(10\uparrow 423\) (exact)
Steinhaus-Moser Notation 186[3] 187[3]
Chained arrow notation \(10\rightarrow 423\) (exact)
Taro's multivariable Ackermann function A(3,1402) A(3,1403)
BEAF & Bird's array notation {10,423} (exact)
Hyper-E notation E423 (exact)
s(n) map \(s(1)^3(\lambda x.x+1)(7)\) \(s(1)^3(\lambda x.x+1)(8)\)
m(n) map m(1)(186) m(1)(187)
Bashicu matrix system (0)(0)(0)(0)(0)(0)(0)(0)[44] (0)(0)(0)(0)(0)(0)(0)(0)[45]
Copy notation 9[423] 10[212]
H* function H(140)
Hyperfactorial array notation 220! 221!
Fast-growing hierarchy \(f_2(1394)\) \(f_2(1395)\)
Hardy hierarchy \(H_{\omega^2}(1394)\) \(H_{\omega^2}(1395)\)
Slow-growing hierarchy \(g_{\omega^{\omega^2 4+\omega 2+3}}(10)\) (exact)

For the long scale:

Notation Lower bound Upper bound
Scientific notation \(1\times10^{840}\) (exact)
Arrow notation \(10\uparrow 840\) (exact)
Steinhaus-Moser Notation 333[3] 334[3]
Chained arrow notation \(10\rightarrow 840\) (exact)
Taro's multivariable Ackermann function A(3,2787) A(3,2788)
BEAF & Bird's array notation {10,840} (exact)
Hyper-E notation E840 (exact)
s(n) map \(s(1)^3(\lambda x.x+1)(8)\) \(s(1)^3(\lambda x.x+1)(9)\)
m(n) map m(1)(333) m(1)(334)
Bashicu matrix system (0)(0)(0)(0)(0)(0)(0)(0)(0)[43] (0)(0)(0)(0)(0)(0)(0)(0)(0)[44]
Fast-growing hierarchy \(f_2(2778)\) \(f_2(2779)\)
Hardy hierarchy \(H_{\omega^2}(2778)\) \(H_{\omega^2}(2779)\)
Slow-growing hierarchy \(g_{\omega^{\omega^2 8+\omega 4}}(10)\) (exact)

Sources[]

  1. Conway and Guy. (1995) "The book of Numbers" Copernicus
  2. Munafo, Robert. The Conway-Wechsler System. Retrieved 2023-02-12.
  3. Olsen, Steve. Big-Ass Numbers. Retrieved 2023-02-12.
  4. Fish. Conway's zillion numbers. Retrieved 2023-02-12.
  5. 1.8. Extensions to the -illions II: Jonathan Bowers' -illions

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
Main article: -illion
100–109: centillion (un- · duo- · tres- · quattuor- · quin- · sex- · septen- · octo- · noven-)
110–119: decicentillion (un- · duo- · tre- · quattuor- · quin- · se- · septen- · octo- · noven-)
120–129: viginticentillion (un- · duo- · tres- · quattuor- · quin- · ses- · septem- · octo- · novem-)
130–139: trigintacentillion (un- · duo- · tres- · quattuor- · quin- · ses- · septen- · octo- · noven-)
140–149: quadragintacentillion (un- · duo- · tres- · quattuor- · quin- · ses- · septen- · octo- · noven-)
150–159: quinquagintacentillion (un- · duo- · tres- · quattuor- · quin- · ses- · septen- · octo- · noven-)
160–169: sexagintacentillion (un- · duo- · tre- · quattuor- · quin- · se- · septen- · octo- · noven-)
170–179: septuagintacentillion (un- · duo- · tre- · quattuor- · quin- · se- · septen- · octo- · noven-)
180–189: octogintacentillion (un- · duo- · tres- · quattuor- · quin- · sex- · septem- · octo- · novem-)
190–199: nonagintacentillion (un- · duo- · tre- · quattuor- · quin- · se- · septe- · octo- · nove-)
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