Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 672: | \[{18^{672}-1\over17}\] | 52 × 74 × 13 × 19 × 29 × 43 × 97 × 113 × 193 × 229 × 307 × 337 × 449 × 457 × 673 × 929 × 1153 × 1373 × 2689 × 3697 × 17837 × 46747 × 80207 × 153133 × 1623833 × 2162497 × 2474209 × 2756993 × 5105857 × 5945857 × 31714369 × 32222107 × 113607841 × 607371619 × 3930785153 × 11019855601<11> × 30894471809<11> × 41448704449<11> × 42569092513<11> × 629114270401<12> × 156107192084257<15> × 820207420126249<15> × 2283079333550401<16> × 6139221193320769<16> × 469692013656380929<18> × 2263132116914116673<19> × 1212757384379976518273<22> × 361981632928757554946658433<27> × 1843537150504780075063108993<28> × 84895222768060262466596250446741089<35> × 151779582913202727124439346779915201139444602522561<51> × 44363539957177959540736657058216966536919376666199888513<56> × 1790953796800843234116097529606767386535325165023808726403601<61> × 26887071039779437467196979649638476047695860339974470308488193<62> × 3312187599047151281303237954374910466077540515305319122175828758014252203895307345051068683387517065372845126632501929830848917663924655874223065178938013802380568601713739715277353604686914705947684400829633<208> |