Base 15 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 475: | \[{15^{475}-1\over14}\] | 11 × 191 × 4931 × 46751 × 876851 × 4272113 × 65959677431<11> × 370649274902657<15> × 7112705843777290751<19> × 353424058867125396513542725081357813010609729278471262111403895782573241<72> × [2817908496477635484519079183278500025249154274299163753344562725572017290294672157831504222696037147267595695407596897017057861813814793520924509575752720349859790989397763352613513197081084260451258146476298436443639925853840514653176723665500739598893992601865558300871092627626568308955283837713758963083543232587053808225799726344222885339969900581922452634385049023792711908120483206820200503249735918780172270651<418>] |