Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 500: | \[{18^{500}-1\over17}\] | 55 × 11 × 13 × 19 × 41 × 101 × 251 × 401 × 1201 × 2711 × 3251 × 9041 × 15101 × 18401 × 102701 × 145501 × 420001 × 602401 × 738851 × 6616503001<10> × 74813517001<11> × 19301767104251<14> × 1437058645425001<16> × 246054241904217701<18> × 17254127651933924651<20> × 21162386787273369601<20> × 40790802137737548350501<23> × 180182156384572588430251<24> × 36775924395863544366841001<26> × 8404798426684218799994459622001<31> × 12826517495346643885871573705174401001<38> × 231579796819291793989898031298609201516232991775501<51> × 14116390572513128348035959898119829062132076781545001<53> × 10373527603288716690006859633178857782450430339379628454501<59> × 6491634192418229513320024614124681801089604555697829345605498173001<67> × 122378983316662586314901626364039311112246588670852928799085901921007069381675550069202001<90> |