Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 417: | \[{7^{417}-1\over6}\] | 3 × 19 × 6673 × 19739 × 673039 × 1522051 × 2788198850651341<16> × 371266463450323577863263631<27> × 4517590853092752320324288547287650695871<40> × 36907186032510520494090542644478414425042667765511537140671634321685208913758955545681985719375774106220917<107> × 3196786100964229883337966459405611537291570650519908718610460103753061049474896638398157739639273351585138541070055732359735377541244970402343<142> |