Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 157: | \[{7^{157}-1\over6}\] | 4397 × 5653 × 1039945344901<13> × 30888375309332174699747764157798083891019286829175554176515308211775675085491164240495874534303554491469173279661<113> |