Base 26 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 71: | \[{26^{71}-1\over25}\] | 1475239 × 2270440490478175159386113<25> × 440314247117511584166211925609<30> × 787829884802028213408768768083188482217<39> |