Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 130: | \[{15^{130}-1\over14}\] | 24 × 11 × 31 × 53 × 79 × 131 × 1531 × 4931 × 157483 × 16655159 × 1294671691 × 1539711288259<13> × 118991428865318211233461<24> × 1962154744388953230433591<25> × 2019047273585208433900886541315654544678694069335036331<55> |