Base 5 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 75: | \[{5^{75}-1\over4}\] | 11 × 31 × 71 × 101 × 151 × 181 × 251 × 401 × 1741 × 3301 × 1989151 × 9384251 × 49892851 × 183794551 |