Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 82: | \[{15^{82}-1\over14}\] | 24 × 83 × 8430332222527<13> × 14052995136749824817978552692323583<35> × 1248945668780874865467604288287146622876086867<46> |