Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 642: | \[{18^{642}-1\over17}\] | 73 × 19 × 307 × 643 × 857 × 5779 × 30817 × 239608739 × 9158544091<10> × 832761290363531<15> × 7123823377958779<16> × 196580368656183553<18> × 7731874493772323357347<22> × 69973191647290497588630127823<29> × 3417007494881580933430384204507<31> × 540918390282121562487078958501625881<36> × 373822013358964207195535689489923040890019181336423948514739110673<66> × 354891121878588694681349312682405514887073712623527701407655951907915754837692739<81> × 107433446150394252705999206534787473698461951232121964469328791510133256591219136564931831019718670351815444914243166742132037933028095886758884422919134271685507763467454615979123562401068561046895043648147<207> × 630204974413900239616698303183987796364950772511272426019360005934441122277089694933477312542238728831107328198359944401717573148121988513566134512193847751705275792613691974501618567589662733523738093423780588026848181639612892971349981053944513383<249> |