Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 290: | \[{15^{290}-1\over14}\] | 24 × 11 × 31 × 59 × 1531 × 1741 × 4931 × 52201 × 640472621166361<15> × 45829626891648603881874121<26> × 15476275967141572773889537007699<32> × 798962746803683694452047348022461<33> × 16234310251180762506604545982584121320088702278121291<53> × 595438841912103003147723443527525527168295940474749551151<57> × 10742665205719702239035931736633456038776965336655176274378819190590029281468183326840017201756174003432441<107> |