The folowing table expresses '691' in various number bases. 'DRx' shows the result of 'digit reducing' resulting in an X-digit long number.
| Base | DR10 | DR9 | DR8 | DR7 | DR6 | DR5 | DR4 | DR3 | DR2 | DR1 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2 | 1010110011 | 110 | 10 | 1 | ||||||
| 3 | 221121 | 100 | 1 | |||||||
| 4 | 22303 | 22,10 | 1 | |||||||
| 5 | 10231 | 12 | 3 | |||||||
| 6 | 3111 | 10 | 1 | |||||||
| 7 | 2005 | 10 | 1 | |||||||
| 8 | 1263 | 14 | 5 | |||||||
| 9 | 847 | 21 | 3 | |||||||
| 10 | 691 | 16 | 7 | |||||||
| 11 | 579 | 1A,10 | 1 | |||||||
| 12 | 497 | 18 | 9 | |||||||
| 13 | 412 | 7 | ||||||||
| 14 | 375 | 11 | 2 | |||||||
| 15 | 311 | 5 | ||||||||
| 16 | 2B3 | 10 | 1 |
Factors: Prime