Base 26 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
40: | \[{26^{40}-1\over25}\] | 33 × 5 × 11 × 17 × 41 × 431 × 677 × 1021 × 1721 × 2081 × 8641 × 26881 × 208518605101<12> × 296985885709361<15> |