Base 11 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 291: | \[{11^{291}-1\over10}\] | 7 × 19 × 389 × 532266937 × 2344437427 × 4247091263 × 28829500653651421<17> × 234778562725637665057<21> × 6266849507589571978149106488222106980975381364824424072801340422775737133656105189072051<88> × 9542575049221875369547650844594147260599137615582683773112251040622096199347795480289750581502500228323676632036925494290139188090806712446799887<145> |