Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 438: | \[{28^{438}-1\over27}\] | 3 × 29 × 271 × 439 × 757 × 877 × 1081277 × 361030699 × 1924218827 × 335391500761<12> × 33110964946441<14> × 61977633102283<14> × 10580251962703577809<20> × 13312839864954300553<20> × 1395719566812246425341583<25> × 8196570580777833295687571<25> × 33669332701243432328246627927<29> × 4096574600013882571943794643612275539257<40> × 53954219746392095021273665412620663895518901407159308722989741<62> × 16281187872171026516474746536528618689418830838477403167062218646993657984510391436265704389705323559535828679377435369342889923925886971285163013<146> × [382601830630002229643563273233896478749395558461486514110622575655710199073724089608213146647583070671817325228367194792350027988549489262732564787128971070156757144798149245973630688440600169807<195>] |