Base 26 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 42: | \[{26^{42}-1\over25}\] | 34 × 72 × 19 × 31 × 37 × 43 × 712 × 211 × 337 × 59011 × 90847 × 321272407 × 2997305809 × 1560259846741<13> |