Base 25 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 71: | \[{25^{71}-1\over24}\] | 569 × 4261 × 5747338499820296170481<22> × 288231038713838413442281<24> × 18607929421228039083223253529869111644362732899<47> |