Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 656: | \[{18^{656}-1\over17}\] | 52 × 13 × 19 × 83 × 97 × 113 × 929 × 165313 × 168347 × 3811279 × 113607841 × 114341047 × 676236289 × 1103301473 × 4354359491<10> × 24997711153<11> × 218124271873<12> × 5912489522977<13> × 6567382040161<13> × 101230436110007637061337<24> × 394867037344695962525971723264825927<36> × 117012619172903468336363755054149226979817746816041<51> × 225024267640198977569930286413453544441731198242501<51> × 582375629960639476627112372134652390329701846353077860182505632016225268301977906296983268115041142967832569874640757892808168865085401464694957638929772947486442118740913009<174> × [557993039604170746283001120139810674939708469180925167382014192886977032965369516078817016990218262952600832565612818193659276402729239702832068122025694111239742221280624451839688700422333799417334148100402854914282577363697504035259405368595983741504803735240263416927245486915780362532809072208675829495724295350547968042328438158482621891337556952408894568731016929<369>] |