Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 428: | \[{8^{428}-1\over7}\] | 32 × 5 × 13 × 643 × 857 × 57781 × 154723 × 843589 × 1016929 × 9512986513<10> × 9763322857<10> × 20636399209<11> × 8174912477117<13> × 17866285599391<14> × 23528569104401<14> × 87251820842149<14> × 157500130135806013<18> × 3396103766435902981<19> × 166125681371619629161<21> × 480625710015394052365153<24> × 5718761969788697451457489<25> × 1260176658389613436649482957<28> × 37866809061660057264219253397<29> × 84115747449047881488635567801<29> × 162259276829213363391578010288127<33> × 210516800089955301807292488792588188869650399862249<51> |