Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 161: | \[{8^{161}-1\over7}\] | 7 × 47 × 127 × 337 × 967 × 1289 × 178481 × 3188767 × 18423553 × 172384633 × 45076044553<11> × 10052678938039<14> × 14808607715315782481<20> × 1186694555374004016103<22> × 14122560700459482493165563202458351462799<41> |