Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
141: | \[{15^{141}-1\over14}\] | 241 × 283 × 659 × 2351 × 6299 × 183959 × 4713067 × 2656097495066872027407960633754824283<37> × 314237271383389423579059164944752760282278580559386914443551938269774331526251335083462921685359096483<102> |