Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 161: | \[{7^{161}-1\over6}\] | 29 × 47 × 3083 × 4733 × 4406588677<10> × 31479823396757<14> × 4615185796935334098258901<25> × 150557819388250184737538915006485086145065087672198550975239193637571002600137<78> |