Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 190: | \[{28^{190}-1\over27}\] | 11 × 29 × 191 × 12161 × 53951 × 637421 × 15310961 × 21084187 × 26449432601<11> × 5504044949138999959<19> × 108044981035496842464510517<27> × 18876519380766175812534662561<29> × 8010545589178234338619518726411686560584870675847476297867777517585821214661<76> × 172661986049058847323684402024645792411560233258306010489125805932697676466625611<81> |