Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 183: | \[{5^{183}-1\over4}\] | 31 × 8419 × 38431 × 918585913061<12> × 140194179307171898833699259<27> × 15786910611608572151933615919570920019287733311030065854227025502988497719030991<80> |