Base 25 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 51: | \[{25^{51}-1\over24}\] | 3 × 7 × 31 × 103 × 409 × 3061 × 8467 × 90271 × 317731 × 528667 × 41540861 × 466344409 × 60119016343<11> × 654652168021<12> |