Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 507: | \[{15^{507}-1\over14}\] | 53 × 241 × 677 × 1249 × 20749 × 157483 × 16655159 × 21914569 × 2266891303 × 41979081847<11> × 90745364581<11> × 194269255213515067<18> × 606451512892729597861<21> × 2318610737675897213064413<25> × 829830140520440994398867075167864951172550269049626875159998833004731253937625926645722509525898668194234431393242308915643116370951124931720241767<147> × [537623731776105246715494859932561780592353964018092984203486698065865097022059728632752001600534865712991061973573603623941175355496029583414030583391756331022220577340873480981924541669998860236787493797796523210331469309988325102269793089451080748796489307977971822429102655973181521556579222133929604195209832449856441<321>] |