Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 219: | \[{28^{219}-1\over27}\] | 3 × 271 × 439 × 1924218827 × 61977633102283<14> × 1395719566812246425341583<25> × 33669332701243432328246627927<29> × 4096574600013882571943794643612275539257<40> × [382601830630002229643563273233896478749395558461486514110622575655710199073724089608213146647583070671817325228367194792350027988549489262732564787128971070156757144798149245973630688440600169807<195>] |