| senary (base 6) to base 21 | ||
|---|---|---|
| 010 | = 06 | = 021 |
| 110 | = 16 | = 121 |
| 210 | = 26 | = 221 |
| 310 | = 36 | = 321 |
| 410 | = 46 | = 421 |
| 510 | = 56 | = 521 |
| 610 | = 106 | = 621 |
| 710 | = 116 | = 721 |
| 810 | = 126 | = 821 |
| 910 | = 136 | = 921 |
| 1010 | = 146 | = a21 |
| 1110 | = 156 | = b21 |
| 1210 | = 206 | = c21 |
| 1310 | = 216 | = d21 |
| 1410 | = 226 | = e21 |
| 1510 | = 236 | = f21 |
| 1610 | = 246 | = g21 |
| 1710 | = 256 | = h21 |
| 1810 | = 306 | = i21 |
| 1910 | = 316 | = j21 |
| 2010 | = 326 | = k21 |
| 2110 | = 336 | = 1021 |
| 2210 | = 346 | = 1121 |
| senary (base 6) to base 21 | ||
|---|---|---|
| 2310 | = 356 | = 1221 |
| 2410 | = 406 | = 1321 |
| 2510 | = 416 | = 1421 |
| 2610 | = 426 | = 1521 |
| 2710 | = 436 | = 1621 |
| 2810 | = 446 | = 1721 |
| 2910 | = 456 | = 1821 |
| 3010 | = 506 | = 1921 |
| 3110 | = 516 | = 1a21 |
| 3210 | = 526 | = 1b21 |
| 3310 | = 536 | = 1c21 |
| 3410 | = 546 | = 1d21 |
| 3510 | = 556 | = 1e21 |
| 3610 | = 1006 | = 1f21 |
| 3710 | = 1016 | = 1g21 |
| 3810 | = 1026 | = 1h21 |
| 3910 | = 1036 | = 1i21 |
| 4010 | = 1046 | = 1j21 |
| 4110 | = 1056 | = 1k21 |
| 4210 | = 1106 | = 2021 |
| 4310 | = 1116 | = 2121 |
| 4410 | = 1126 | = 2221 |
| 4510 | = 1136 | = 2321 |
| senary (base 6) to base 21 | ||
|---|---|---|
| 4610 | = 1146 | = 2421 |
| 4710 | = 1156 | = 2521 |
| 4810 | = 1206 | = 2621 |
| 4910 | = 1216 | = 2721 |
| 5010 | = 1226 | = 2821 |
| 5110 | = 1236 | = 2921 |
| 5210 | = 1246 | = 2a21 |
| 5310 | = 1256 | = 2b21 |
| 5410 | = 1306 | = 2c21 |
| 5510 | = 1316 | = 2d21 |
| 5610 | = 1326 | = 2e21 |
| 5710 | = 1336 | = 2f21 |
| 5810 | = 1346 | = 2g21 |
| 5910 | = 1356 | = 2h21 |
| 6010 | = 1406 | = 2i21 |
| 6110 | = 1416 | = 2j21 |
| 6210 | = 1426 | = 2k21 |
| 6310 | = 1436 | = 3021 |
| 6410 | = 1446 | = 3121 |
| 6510 | = 1456 | = 3221 |
| 6610 | = 1506 | = 3321 |
| 6710 | = 1516 | = 3421 |
| 6810 | = 1526 | = 3521 |
| senary (base 6) to base 21 | ||
|---|---|---|
| 6910 | = 1536 | = 3621 |
| 7010 | = 1546 | = 3721 |
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.