Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 720: | \[{18^{720}-1\over17}\] | 53 × 73 × 11 × 13 × 19 × 31 × 372 × 41 × 61 × 73 × 97 × 113 × 181 × 229 × 241 × 307 × 457 × 577 × 601 × 641 × 881 × 929 × 991 × 1153 × 2711 × 9041 × 15101 × 15121 × 16921 × 25309 × 34327 × 145501 × 313921 × 465841 × 547681 × 558721 × 585721 × 828811 × 921121 × 2474209 × 33388093 × 113607841 × 7804804801<10> × 11019855601<11> × 11630180251<11> × 42569092513<11> × 495520919281<12> × 872666624341<12> × 553141343663281<15> × 5995443875902561<16> × 8317058910008581<16> × 137841514501966721<18> × 994416129981667873<18> × 7414337897636419261<19> × 459390320979771734960401<24> × 1614949986544027569856891<25> × 86986651687050077282940481<26> × 123493831186918813797388081<27> × 1338029376807245057016053427001<31> × 1338258845052393545608356556801<31> × 23007113434668367286031526391280991361<38> × 3121305456784833993911822639198925029281<40> × 431117813805951239847529546947429571285452488754073146974865204374401<69> × 12622417153307832220227596976077601049767465341735384224865969776349076733788505921<83> × [19726363142980860782460731825267204860379265932880066284653251699704606850282178933397280472128766380324609776901368556625422594361019297877203374819047018793280654785421638376599023222598725615608161<200>] |