Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 97: | \[{15^{97}-1\over14}\] | 373115933 × 165984138349<12> × 3385663183327<13> × 1938177886827124931<19> × 211727039173815789139263712464214518933075943626165409606172029<63> |