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) | base 5 | senary (base 6) | base 5 |
|---|
| 1 | ≈ 1 | 15 | ≈ 21 |
| 2 | ≈ 2 | 20 | ≈ 22 |
| 3 | ≈ 3 | 21 | ≈ 23 |
| 4 | ≈ 4 | 22 | ≈ 24 |
| 5 | ≈ 10 | 23 | ≈ 30 |
| 10 | ≈ 11 | 24 | ≈ 31 |
| 11 | ≈ 12 | 25 | ≈ 32 |
| 12 | ≈ 13 | 30 | ≈ 33 |
| 13 | ≈ 14 | 31 | ≈ 34 |
| 14 | ≈ 20 | 32 | ≈ 40 |