Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 240: | \[{15^{240}-1\over14}\] | 27 × 11 × 13 × 17 × 31 × 41 × 61 × 113 × 211 × 241 × 1201 × 1361 × 1489 × 1531 × 3169 × 3877 × 4931 × 7121 × 17761 × 19231 × 19421 × 33601 × 131381 × 142111 × 179953 × 278041 × 1659649 × 1877761 × 39225301 × 706195561 × 1248882721 × 2414458561 × 2562840001 × 13535373521<11> × 329380317601<12> × 133390439104361<15> × 29939982202071965036641<23> × 1006101271862820362016481<25> × 2342027117915665091812321<25> × 100519676708380742147333029784121601<36> |