Base 14 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 63: | \[{14^{63}-1\over13}\] | 43 × 211 × 379 × 397 × 547 × 18973 × 8108731 × 407364049 × 2239000891 × 1179856192739099325001663965211<31> |