Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 380: | \[{28^{380}-1\over27}\] | 52 × 11 × 29 × 61 × 157 × 191 × 12161 × 14561 × 15581 × 53951 × 84961 × 637421 × 10653073 × 15310961 × 21084187 × 4295845129<10> × 26449432601<11> × 47560093775549<14> × 15173293400590441<17> × 5504044949138999959<19> × 5746048837796495176973<22> × 108044981035496842464510517<27> × 18876519380766175812534662561<29> × 8010545589178234338619518726411686560584870675847476297867777517585821214661<76> × 172661986049058847323684402024645792411560233258306010489125805932697676466625611<81> × 104144160635534016929457065187578494808376316516588356699484715787691503592520404256023365744792901103869377985678063985565818066107322041842755781278128269831439498799342973778583926010621<189> |