Base 28 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 255: | \[{28^{255}-1\over27}\] | 3 × 31 × 103 × 271 × 15991 × 57427 × 637421 × 734941 × 887401 × 8061059901399457<16> × 148020807352107352204781<24> × 412037760199357579738273<24> × 451024205517517423233774595442089125772950234281803785388700007290734071220905548590621<87> × [178649773318164451523837201499965543447408704701422230554160999750916338404034811640059611066157964462637442631336282430108186765885793938567266541157186132646455642722895372371244521261<186>] |