Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 249: | \[{7^{249}-1\over6}\] | 3 × 19 × 167 × 66733 × 11606389 × 76066181 × 7685542369<10> × 62911130477521<14> × 303567967057423<15> × 18624275418445601<17> × 41491794184631137<17> × 76354359945860977734571491962874304923412180177<47> × 92237305696440402239375771518398924770764703404688588026267825954909<68> |