Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
177: | \[{15^{177}-1\over14}\] | 241 × 3541 × 10267 × 90794150425718941<17> × 41735992970177767981<20> × 298157610720691362563759<24> × 587232859318586491409325369440965227015251999<45> × 180972846504426843468777551505468428743337593786723314431207253447435336385428707840098066303<93> |