The octyllion is equal to \(10^{1,024}\) in the myriad system[1][2], or 10 squared 10 times. It is 1,025 digits long. Nirvana Supermind calls this number unectol, and it's equal to \(r(10,1)\) in Rampant Array Notation[3].

Decimal expansion

10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

Approximations

Notation Lower bound Upper bound
Scientific notation \(1\times10^{1024}\)
Arrow notation \(10\uparrow1024\)
Steinhaus-Moser Notation 394[3] 395[3]
Copy notation 9[1024] 1[1025]
Taro's multivariable Ackermann function A(3,3398) A(3,3399)
Pound-Star Notation #*((70))*19 #*((71))*19
BEAF {10,1024}
Hyper-E notation E1,024
Bashicu matrix system (0)(1)[3] (0)(1)[4]
Hyperfactorial array notation 458! 459!
Fast-growing hierarchy \(f_2(3\,389)\) \(f_2(3\,390)\)
Hardy hierarchy \(H_{\omega^2}(3\,389)\) \(H_{\omega^2}(3\,390)\)
Slow-growing hierarchy \(g_{\omega^{\omega^3+\omega \times 2+4}}(10)\)

Sources

See also

Basic notation:

Myriad System Numbers myllion · byllion · tryllion · quadryllion · quintyllion · sextyllion · septyllion · octyllion · nonyllion · decyllion · undecyllion · duodecyllion · tredecyllion · quattuordecyllion · quindecyllion · sexdecyllion · septdecyllion · octodecyllion · novemdecyllion · vigintyllion · unvigintyllion · duovigintyllion · trevigintyllion · quattuorvigintyllion · quinvigintyllion · sexvigintyllion · septemvigintyllion · octovigintyllion · novemvigintyllion · trigintyllion · untrigintyllion · duotrigintyllion · tretrigintyllion · quattuortrigintyllion · quintrigintyllion · sextrigintyllion · septtrigintyllion octotrigintyllion · novemtrigintyllion · quadragintyllion · quinquagintyllion · sexagintyllion · septuagintyllion · octogintyllion · nonagintyllion · centyllion · ducentyllion · trecentyllion · quadringentyllion · quingentyllion · sescentyllion · septingentyllion · octingentyllion · nongentyllion · millyllion · myryllion · micryllion · nanyllion · picyllion · femtyllion · attyllion · zeptyllion · yoctyllion · googolyllion · latinlatinlatinbyllionyllionyllionyllion

Community content is available under CC-BY-SA unless otherwise noted.