Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 259: | \[{15^{259}-1\over14}\] | 7 × 223 × 4441 × 1743463 × 32217011 × 41967977717<11> × 2474070455887<13> × 29645965890637091<17> × 1691309974743902012809<22> × [1427603100006025141374261895928781031472196866655635306392712378728900865955482477891918354166924528678361029082145913815674572247818943930373182711831842638825575593803002197956336522669838191952993646359737017518963422837<223>] |