Base 14 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 64: | \[{14^{64}-1\over13}\] | 3 × 5 × 17 × 41 × 193 × 197 × 937 × 5393 × 7489 × 16097 × 1204905857 × 1667461121 × 315256811699009<15> × 11284732320255809<17> |