The folowing table expresses '8191' in various number bases. 'DRx' shows the result of 'digit reducing' resulting in an X-digit long number.
| Base | DR13 | DR12 | DR11 | DR10 | DR9 | DR8 | DR7 | DR6 | DR5 | DR4 | DR3 | DR2 | DR1 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2 | 1111111111111 | 1101 | 11,10 | 1 | |||||||||
| 3 | 102020101 | 21,10 | 1 | ||||||||||
| 4 | 1333333 | 103 | 10 | 1 | |||||||||
| 5 | 230231 | 21 | 3 | ||||||||||
| 6 | 101531 | 15,10 | 1 | ||||||||||
| 7 | 32611 | 16,10 | 1 | ||||||||||
| 8 | 17777 | 35,10 | 1 | ||||||||||
| 9 | 12211 | 7 | |||||||||||
| 10 | 8191 | 19,10 | 1 | ||||||||||
| 11 | 6177 | 1A,10 | 1 | ||||||||||
| 12 | 48A7 | 25 | 7 | ||||||||||
| 13 | 3961 | 16 | 7 | ||||||||||
| 14 | 2DB1 | 1D,10 | 1 | ||||||||||
| 15 | 2661 | 10 | 1 | ||||||||||
| 16 | 1FFF | 2E,10 | 1 |
Factors: Prime
8,191 is the 6th Mersenne number (p=13).