Base 25 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 68: | \[{25^{68}-1\over24}\] | 22 × 13 × 137 × 313 × 409 × 1973 × 3061 × 20129 × 45289 × 623017 × 41540861 × 466344409 × 12447002677<11> × 938894988049<12> × 1361753880209<13> × 4959636586609<13> |