Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 74: | \[{7^{74}-1\over6}\] | 23 × 149 × 223 × 2887 × 4805345109492315767981401<25> × 15572244900182528777225808449<29> |
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 74: | \[{7^{74}-1\over6}\] | 23 × 149 × 223 × 2887 × 4805345109492315767981401<25> × 15572244900182528777225808449<29> |