Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 588: | \[{20^{588}-1\over19}\] | 32 × 73 × 13 × 29 × 43 × 71 × 127 × 197 × 401 × 421 × 827 × 883 × 1471 × 3529 × 5881 × 10529 × 12277 × 14561 × 32719 × 460951 × 1464961 × 2750161 × 8651161 × 36363727 × 269737651 × 1424354653 × 8442733531<10> × 857706097333<12> × 2488859795549<13> × 1327100500372993081<19> × 399183749354915560790107963<27> × 158801586229862983170858567089<30> × 9293953441663713774978397259701<31> × 6551154092925933298930251891324599<34> × 5904533446342503800755221573474491858998357053469<49> × 628292358238289452269193508271835428805485714102857143<54> × 5868970976675994117193657065956205629904710379447645616883364917958700241<73> × 13149431066432694799534977107679246791059834401228556359210092801566281439371614848468492182188987082746431<107> × [436215179442115464563706486405689819910595524288953389762306177612396553754829292249220791690028656838403583473832318831059801390867228657278873056583129160576579631250951072217262427775013952770024853123997<207>] |