Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 241: | \[{15^{241}-1\over14}\] | 15907 × 33385249 × 96587019922156429<17> × 35224832222028339718575071<26> × 5147481717864797011303150678721661594883<40> × [210552296806935648779238225745821086740039949766416891237569290590818251956550782902432615731729363984904125405711691074876825492240441689483434627153942071369383084515718086923968010747971<189>] |