Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 507: | \[{31^{507}-1\over30}\] | 3 × 792 × 331 × 9127 × 13807 × 39703 × 42407 × 45293 × 2426789 × 7908811 × 9813493 × 1032424381 × 5920504804553<13> × 9290441180785207<16> × 12391645502426330473763<23> × 53144062154237462773639<23> × 175500339130677572941801<24> × 246372614859100599467214820155305945180374502837206597583802072503165940026914058196652312626036879236919228129637005523900572987483338004521257374919215587252381<162> × [2424713724297096877490761803202385507172626789086795711427760703578890101209611782660922631963687566350689986383104135843750978934756319146606614225116600019610968587512639767367668954974033190476385601851630134519118347498305304072195303878910033492323612696514844643744763547813708370358221681954612398042387387967777602502602468198952023955071275899825002244746251677565012076786175836711996367886495420473313904461960855071524879005053<439>] |