Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 407: | \[{15^{407}-1\over14}\] | 67 × 223 × 463 × 2333 × 3257 × 4441 × 8537 × 32217011 × 2474070455887<13> × 29645965890637091<17> × [708063615115620366934644811167256365187584231336632778892489704517136073877650389432421375996397988886499087433685901214936323926661087605621447547123192573847360476297926552247361584075581043993999916241754666977773786121972217659939896403355891395275135160710819611020431654146657598244069786770668646112025748405423166741946648725587894445934292811791184418040106492745360205021223728819943450631394172431392107788873<420>] |