Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 146: | \[{7^{146}-1\over6}\] | 23 × 439 × 3067 × 279883 × 3675989 × 359390389 × 1958423494433591<16> × 7222605228105536202757606969<28> × 7167647480643504302058174754486698790538818746798241<52> |