Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 380: | \[{15^{380}-1\over14}\] | 25 × 11 × 31 × 113 × 191 × 229 × 571 × 1531 × 2851 × 4931 × 13757 × 19421 × 26297 × 131381 × 4272113 × 6837459701<10> × 65959677431<11> × 18434831466377<14> × 370649274902657<15> × 439799488353587<15> × 1045074297886141<16> × 4485532699379697977461729<25> × 45186569761128841661272737901<29> × 66192523311449074597991545296985081<35> × 353424058867125396513542725081357813010609729278471262111403895782573241<72> × 220027516600010905855279780538519699473050721301219319804601437396309954055801<78> × 15194816103663638259807615166046591221097599519423811748908113840082451058987284101<83> |