Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 390: | \[{15^{390}-1\over14}\] | 24 × 11 × 31 × 53 × 61 × 79 × 131 × 211 × 241 × 1171 × 1249 × 1531 × 4931 × 19231 × 20749 × 142111 × 157483 × 5557501 × 7339411 × 16655159 × 39225301 × 1165519291 × 1294671691 × 1539711288259<13> × 606451512892729597861<21> × 3230061048592350229141<22> × 118991428865318211233461<24> × 1962154744388953230433591<25> × 17876704352384312776165924815416713005241<41> × 86616029399336750121659131185472687790010270451<47> × 86801161709481398367704754054349495738392004441<47> × 2019047273585208433900886541315654544678694069335036331<55> × 4811797743157031888177131043614227977499014283305880392742348701139045001<73> |