Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 183: | \[{7^{183}-1\over6}\] | 3 × 19 × 367 × 4759 × 177237331 × 5153013553<10> × 104199666470736545959920137256413473<36> × 1914662449813727660680530326064591907<37> × 413198191973520575636786477890914089687989610209766472529<57> |