Base 21 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 435: | \[{21^{435}-1\over20}\] | 5 × 59 × 211 × 463 × 9391 × 18181 × 40841 × 1504231 × 1103704099 × 3750952801 × 246763300513<12> × 687613372491653<15> × 10560867746962116514771<23> × 7826081384442721874824416529<28> × 13477015991023291802765110016390772920553907009<47> × 21933305517206008074555499460677419485784113293205521<53> × 33516108735906048319408808055288256871397516473638732084022278909501<68> × [42084552762773054508743848155392051312040771553269766725918851791521836085470929047581279857099803075003172375042354699238468869625055231063802261034451264635028981491606631137635688406995103779558099278134840002998086078586886622156101151957104464289427719131323999545717506826856591841<287>] |