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 3 | senary (base 6) | base 3 |
|---|
| 1 | ≈ 1 | 15 | ≈ 102 |
| 2 | ≈ 2 | 20 | ≈ 110 |
| 3 | ≈ 10 | 21 | ≈ 111 |
| 4 | ≈ 11 | 22 | ≈ 112 |
| 5 | ≈ 12 | 23 | ≈ 120 |
| 10 | ≈ 20 | 24 | ≈ 121 |
| 11 | ≈ 21 | 25 | ≈ 122 |
| 12 | ≈ 22 | 30 | ≈ 200 |
| 13 | ≈ 100 | 31 | ≈ 201 |
| 14 | ≈ 101 | 32 | ≈ 202 |