Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 490: | \[{31^{490}-1\over30}\] | 25 × 5 × 11 × 41 × 71 × 491 × 1471 × 6959 × 11971 × 17351 × 21821 × 32341 × 71821 × 319061 × 10996091 × 149269961 × 203633641 × 917087137 × 2932755253 × 29220445871<11> × 1325489196571<13> × 9240957640390889951861<22> × 60427990638165876546967231<26> × 451562277763820894900941375861<30> × 147882001432537751112306358052999119715341090542830827<54> × 62322419393153627851729037464684263699383389269055382039663<59> × [149776082378610511645822772177744851212612067354883945075526792323287681015409644396880149462326095360497908117779168490220752070535118470799380325048644440168895986975833911541849001829902270587069379298261<207>] × [1860458732272543825617249078563416647740839071322122820303214611417959303512382934843833487377447335156595437233042160568912036216016145577414598057023467341431610271152785515884246443969149177822890185912364670147496702277591<226>] |