Base 25 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 69: | \[{25^{69}-1\over24}\] | 3 × 7 × 31 × 47 × 139 × 6211 × 8971 × 66163549 × 253592389 × 332207361361<12> × 598761682261<12> × 8868050880709<13> × 42272797713043<14> × 403316413944121<15> |