Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 180: | \[{8^{180}-1\over7}\] | 34 × 52 × 11 × 13 × 19 × 31 × 37 × 41 × 61 × 73 × 109 × 151 × 181 × 271 × 331 × 541 × 631 × 811 × 1321 × 15121 × 23311 × 30241 × 49681 × 54001 × 87211 × 246241 × 262657 × 279073 × 348031 × 18837001 × 29247661 × 49971617830801<14> × 165041853060421<15> × 385838642647891<15> × 166242935471754241<18> |