Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 120: | \[{15^{120}-1\over14}\] | 26 × 11 × 13 × 17 × 31 × 41 × 61 × 113 × 211 × 241 × 1201 × 1489 × 1531 × 3877 × 4931 × 17761 × 19231 × 19421 × 33601 × 131381 × 142111 × 278041 × 39225301 × 706195561 × 2414458561 × 2562840001 × 133390439104361<15> × 1006101271862820362016481<25> |