Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 396: | \[{18^{396}-1\over17}\] | 52 × 73 × 13 × 19 × 23 × 372 × 67 × 73 × 89 × 199 × 229 × 307 × 397 × 457 × 991 × 1321 × 2377 × 16127 × 25309 × 25939 × 34327 × 51217 × 465841 × 536801 × 1392733 × 3611719 × 6301307 × 8481331 × 13780009 × 17004241 × 33388093 × 1527087937 × 55547468813<11> × 2570735949673<13> × 8941138915237<13> × 55512346060810981<17> × 4893407785654797223<19> × 6489496006585655053<19> × 7741563936876515923<19> × 2126524541648886863763049<25> × 12042065697120681040605799<26> × 70250785809906403798948366813<29> × 1872257572096557966943656688231237<34> × 114892149709585452397582439337260631485522971<45> × 117206168731902676796790484884706056816111011068777<51> × 2658690720654112541102339683821024632102204499313681<52> |