The folowing table expresses '1721' in various number bases. 'DRx' shows the result of 'digit reducing' resulting in an X-digit long number.
| Base | DR11 | DR10 | DR9 | DR8 | DR7 | DR6 | DR5 | DR4 | DR3 | DR2 | DR1 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2 | 11010111001 | 111 | 11,10 | 1 | |||||||
| 3 | 2100202 | 21,10 | 1 | ||||||||
| 4 | 122321 | 23,11 | 2 | ||||||||
| 5 | 23341 | 23,10 | 1 | ||||||||
| 6 | 11545 | 24,10 | 1 | ||||||||
| 7 | 5006 | 14 | 5 | ||||||||
| 8 | 3271 | 15 | 6 | ||||||||
| 9 | 2322 | 10 | 1 | ||||||||
| 10 | 1721 | 11 | 2 | ||||||||
| 11 | 1325 | 10 | 1 | ||||||||
| 12 | BB5 | 23 | 5 | ||||||||
| 13 | A25 | 14 | 5 | ||||||||
| 14 | 8AD | 23 | 5 | ||||||||
| 15 | 79B | 1C | D | ||||||||
| 16 | 6B9 | 1A | B |
Factors: Prime