Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 239: | \[{5^{239}-1\over4}\] | 479 × 40093613041379<14> × 1473534596915206322445556077174781171340308026061819537080103719298166168947549642538525464219037490151421698581086237756602026720817756235926209843391<151> |