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Primeval number
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==Base 12== In [[duodecimal|base 12]], the primeval numbers are: (using inverted two and three for ten and eleven, respectively) :1, 2, 13, 15, 57, 115, 117, 125, 135, 157, 1017, 1057, 1157, 1257, 125Ζ, 157Ζ, 167Ζ, ... The number of primes that can be obtained from the primeval numbers is: (written in base 10) :0, 1, 2, 3, 4, 5, 6, 7, 8, 11, 12, 20, 23, 27, 29, 33, 35, ... {|class="wikitable" ! Primeval number !! Primes obtained !! Number of primes (written in base 10) |- | 1 |||| 0 |- | 2 || 2 || 1 |- | 13 || 3, 31 || 2 |- | 15 || 5, 15, 51 || 3 |- | 57 || 5, 7, 57, 75 || 4 |- | 115 || 5, 11, 15, 51, 511 || 5 |- | 117 || 7, 11, 17, 117, 171, 711 || 6 |- | 125 || 2, 5, 15, 25, 51, 125, 251 || 7 |- | 135 || 3, 5, 15, 31, 35, 51, 315, 531 || 8 |- | 157 || 5, 7, 15, 17, 51, 57, 75, 157, 175, 517, 751 || 11 |} Note that 13, 115 and 135 are composite: 13 = 3Γ5, 115 = 7Γ1Ζ, and 135 = 5Γ31.
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