Base 21 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 465: | \[{21^{465}-1\over20}\] | 5 × 211 × 311 × 373 × 463 × 1303 × 9391 × 18181 × 40841 × 519169711 × 4540713283<10> × 397280183491<12> × 3936833990413<13> × 1806627657196261<16> × 272581865551637989<18> × 331444555707209696951<21> × 5490236844314625181981860471139<31> × 10051236464468058997903023288131<32> × 7687249112242592598176964045333142849438561<43> × 2066946122082360949514509181598305257599462100251009362457171229571826170644439791511<85> × [124998377809240139334510694353347589835940717537437596912718666446009820449617992341182649958645841276076492310366179290652475658453242826679228473828573353135357295014458765213654743401705306573585268151622108269683621696265524384614587308928243713043368704901535761578566201716823497116038811467721741<303>] |