Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 195: | \[{15^{195}-1\over14}\] | 11 × 53 × 61 × 131 × 241 × 1249 × 4931 × 20749 × 157483 × 16655159 × 39225301 × 606451512892729597861<21> × 17876704352384312776165924815416713005241<41> × 2019047273585208433900886541315654544678694069335036331<55> × 4811797743157031888177131043614227977499014283305880392742348701139045001<73> |