Base 26 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
57: | \[{26^{57}-1\over25}\] | 192 × 37 × 1597 × 33403 × 551192154259<12> × 54509933224633<14> × 916631343715906315531<21> × 917842427566819615573<21> |