Base 13 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 104: | \[{13^{104}-1\over12}\] | 23 × 5 × 7 × 17 × 53 × 13417 × 14281 × 20333 × 79301 × 86113 × 264031 × 380329 × 1803647 × 2176307537 × 224277684782113<15> × 1418792215861230619657<22> × 7009558351001043033313937<25> |