Base 14 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 68: | \[{14^{68}-1\over13}\] | 3 × 5 × 103 × 137 × 197 × 2857 × 2774129 × 1253535423961<13> × 475021736393117<15> × 14837638311110071<17> × 22771730193675277<17> |