Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 111: | \[{7^{111}-1\over6}\] | 3 × 19 × 223 × 2887 × 6217 × 177379 × 56713875643149053038693<23> × 4805345109492315767981401<25> × 96651302095748872822763048599<29> |