Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 275: | \[{15^{275}-1\over14}\] | 112 × 67 × 463 × 2333 × 4931 × 8537 × 46751 × 204601 × 1011671 × 7112705843777290751<19> × 13317578924907113920801<23> × 9273757272736041033417670310849312570581<40> × [6066220717788527057494912885730195559462265237371683347592265281482389938959632877574226374548251435471838261993557178553076223722782944081042661106337912759366920843983447692697911923165809412928118847954601<208>] |