The **senary** numeral system (also known as base-6 or heximal) has six as its base. It has been adopted independently by a small number of cultures. Like decimal, it is a semiprime, though being the product of the only two consecutive numbers that are both prime (2 and 3) it has a high degree of mathematical properties for its size. As six is a superior highly composite number, many of the arguments made in favor of the duodecimal system also apply to this base-6.

#### conversion table

senary (base 6) | decimal | senary (base 6) | decimal |
---|

1 | = 1 | 15 | = 11 |

2 | = 2 | 20 | = 12 |

3 | = 3 | 21 | = 13 |

4 | = 4 | 22 | = 14 |

5 | = 5 | 23 | = 15 |

10 | = 6 | 24 | = 16 |

11 | = 7 | 25 | = 17 |

12 | = 8 | 30 | = 18 |

13 | = 9 | 31 | = 19 |

14 | = 10 | 32 | = 20 |