Base 14 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 74: | \[{14^{74}-1\over13}\] | 3 × 5 × 223 × 283051 × 141405986837<12> × 118918748615980063<18> × 5052787535809680019<19> × 6223308177932683558580086481<28> |