Base 8 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 331: | \[{8^{331}-1\over7}\] | 23833 × 55609 × 16937389168607<14> × 865118802936559<15> × 857491387188810516016046647<27> × 921777666286057213147728970951<30> × 298542624980197463613767215333569428005686468835821253721796682625551919<72> × 2609632444767351818039224561381428070568966964983359447855731078649164681952162319892295956611169166052959992530327506629959995031431<133> |