Base 26 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 69: | \[{26^{69}-1\over25}\] | 19 × 37 × 13709 × 1086199 × 1528507873 × 615551139461<12> × 174509342263274926909302971286445250233741884626422526380895551<63> |