Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
191: | \[{19^{191}-1\over18}\] | 383 × 9073197533<10> × 16278226258755846062473<23> × 68242299724840351788569038268426245289817965335706655918213265707740953707564871<80> × 251214904493082032563886705050066067238402478385074334628726960398705880246160207410703281325958480421958977181479251296511912873<129> |