Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 163: | \[{7^{163}-1\over6}\] | 653 × 9781 × 1260643 × 962207945014470392304193<24> × 1648536343690282975764489383562678396141955057<46> × 7354840357696348186997141461981606470291584313584199443<55> |