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The quaternary numeral system is a place-value notation using the powers of 4 (see A000302) rather than the powers of 10.
See also
Standard positional numeral systems
Base
|
Latin (-ary) (Cardinals)
|
Latin (-al) (Ordinals)
|
Greek (-al)
|
Greek (-adic)
|
Usage
|
1
|
Unary, Primary
|
Primal
|
|
Monadic, Henadic
|
|
2
|
Binary, Secondary
|
Dual
|
|
Dyadic
|
|
3
|
Ternary, Tertiary
|
Tertial
|
|
Triadic
|
|
4
|
Quaternary
|
Quartal
|
|
Tetradic
|
|
5
|
Quinary
|
Quintal
|
Pental
|
Pentadic
|
|
6
|
Senary
|
Sextal
|
Hexal
|
Hexadic
|
|
7
|
Septenary
|
Septimal
|
Heptal
|
Heptadic
|
|
8
|
Octonary
|
Octonal
|
Octal
|
Octadic
|
|
9
|
Nonary, Novary
|
Nonal, Noval
|
|
Enneadic
|
|
10
|
Denary
|
Decimal
|
Decimal
|
Decadic
|
|
11
|
Undenary, Unodenary
|
Undecimal, Unodecimal
|
Henadecimal
|
Hendecadic
|
|
12
|
Duodenary, Dozenary
|
Duodecimal, Dozenal
|
Dyadecimal
|
Dyadecadic
|
|
13
|
Tredenary, Triodenary
|
Tredecimal, Triodecimal
|
Tridecimal
|
Triadecadic
|
|
14
|
Quadrodenary, Quattuordenary
|
Quadrodecimal, Quattuordecimal
|
Tetradecimal
|
Tetradecadic
|
|
15
|
Quindenary
|
Quindecimal
|
Pentadecimal
|
Pentadecadic
|
|
16
|
Sedenary, Sexadenary
|
Sedecimal, Sexadecimal
|
Hexadecimal
|
Hexadecadic
|
|
17
|
Septendenary
|
Septendecimal
|
Heptadecimal
|
Heptadecadic
|
|
18
|
Octodenary
|
Octodecimal
|
Octadecimal
|
Octadecadic
|
|
19
|
Nonadenary
|
Nonadecimal, Novodecimal
|
Enneadecimal
|
Enneadecadic
|
|
20
|
Vigenary
|
Vigesimal
|
|
Icosadic
|
|
24
|
|
Quadrivigesimal
|
|
Tetraicosadic
|
|
26
|
|
Sexavigesimal
|
|
Hexaicosadic
|
|
27
|
|
Septemvigesimal
|
|
Heptaicosadic
|
|
30
|
Tricenary
|
Trigesimal
|
|
Triacontadic
|
|
32
|
|
Duotrigesimal
|
|
Dyatriacontadic
|
|
36
|
|
Sexatrigesimal
|
|
Hexatriacontadic
|
|
40
|
Quadragenary
|
Quadragesimal
|
Tetragesimal
|
Tetracontadic
|
|
50
|
Quincagenary
|
Quincagesimal
|
Pentagesimal
|
Pentacontadic
|
|
60
|
Sexagenary
|
Sexagesimal
|
Hexagesimal
|
Hexacontadic
|
|
64
|
Quadrisexagenary
|
Quadrisexagesimal
|
Tetrahexagesimal
|
Tetrahexacontadic
|
Base64 encoding
|
70
|
Septuagenary
|
Septuagesimal
|
Heptagesimal
|
Heptacontadic
|
|
80
|
Octogenary
|
Octogesimal
|
Octagesimal
|
Octacontadic
|
|
90
|
Nonagenary
|
Nonagesimal
|
Enneagesimal
|
Enneacontadic
|
|
100
|
Centenary
|
Centesimal, Centimal
|
Centimal
|
Hecatontadic
|
|
200
|
Ducenary, Bicentenary
|
Dugentesimal, Bicentimal
|
Dyacentesimal, Dyacentimal
|
Dyahecatontadic
|
|
300
|
Trecenary, Tercentenary
|
Tregentesimal, Tercentimal
|
Tricentesimal, Tricentimal
|
Triahecatontadic
|
|
400
|
Quadringenary, Quadricentenary
|
Quadringentesimal, Quattrocentimal
|
Tetracentesimal, Tetracentimal
|
Tetrahecatontadic
|
|
500
|
Quingenary, Quinquocentenary
|
Quingentesimal, Quincentimal
|
Pentacentesimal, Pentacentimal
|
Pentahecatontadic
|
|
600
|
Sexingenary, Sexcentenary
|
Sexingesimal, Sescentimal
|
Hexacentesimal, Hexacentimal
|
Hexahecatontadic
|
|
700
|
Septingenary, Septcentenary
|
Septingentesimal, Septuacentimal
|
Heptacentesimal, Heptacentimal
|
Heptahecatontadic
|
|
800
|
Octingenary, Octocentenary
|
Octingentesimal, Octocentimal
|
Octacentesimal, Octacentimal
|
Octahecatontadic
|
|
900
|
Nongenary, Nonacentenary
|
Noningentesimal, Novacentimal
|
Enneacentesimal, Enneacentimal
|
Enneahecatontadic
|
|
1000
|
Millenary
|
Millesimal
|
|
Chiliadic
|
|
10000
|
|
|
|
Myriadic
|
|
Notes