Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
111: | \[{15^{111}-1\over14}\] | 223 × 241 × 4441 × 9769 × 32217011 × 76736743 × 2474070455887<13> × 29645965890637091<17> × 661198877270593946341<21> × 8985671723916697159306375206873223170546534131329363<52> |