Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 490: | \[{15^{490}-1\over14}\] | 24 × 72 × 11 × 31 × 71 × 197 × 491 × 1531 × 4931 × 5881 × 883471 × 1059871 × 1743463 × 4167731 × 5706541 × 10164071 × 10678711 × 25036159 × 35549599 × 497638891 × 93589065767<11> × 2053715817301<13> × 4175288799599<13> × 1716116764931059<16> × 36083117529286469251<20> × 53096945644422356461<20> × 14675999570738648605387<23> × 4695010155485125120389014551<28> × 20315551386390423124770812609169632563434241<44> × 644409872395888287966888938178608608339840812780823609707949851396468072562730360499826221685201198669842363127056961<117> × 379935328651372904282683527732514769069394860139340657271377123551465464105864403995126706266483905643307211192754923683436862431757962034599955698956869401175525824149301786586520311<183> |