Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 309: | \[{7^{309}-1\over6}\] | 3 × 19 × 619 × 17923 × 220400431 × 29650439178674631118602918288131887<35> × 10316589882658148664018432412741304154103858145253645339510927287724805842171756259<83> × 5338105691483530569261005264881901895127921305900617343386173369900199430919826339722652638090324026800292069618093273287821843<127> |