Base 6 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 247: | \[{6^{247}-1\over5}\] | 191 × 1483 × 3433 × 760891 × 77071411 × 329143658741<12> × 638073026189<12> × 82569737524705024142782304189<29> × 323033809754809551275470126256493156753544117260132368655520286377190266214087382779754865868297377414472374291432843<117> |