Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 105: | \[{7^{105}-1\over6}\] | 3 × 19 × 29 × 31 × 2801 × 4733 × 159871 × 2127431041 × 11898664849<11> × 77192844961<11> × 42693162668620904426304495389707999425601<41> |