Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 209: | \[{15^{209}-1\over14}\] | 67 × 419 × 463 × 2333 × 8537 × 4272113 × 370649274902657<15> × 310696428100789261359841<24> × 2830170168716196662596829227<28> × 125921698843743399194210298512088198559323639583833396680305574079338706886075580993734046407108846599194890294087527422907412025284967858694827182425952131617<159> |