Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 389: | \[{3^{389}-1\over2}\] | 51349 × 19404514058063<14> × 15573016748048048503912224242515798000782107281721099399054521<62> × 12833070437721262405919444749126850063599263479114742377376863084594289791974787092715242460058184837063283<107> |