Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 212: | \[{18^{212}-1\over17}\] | 52 × 13 × 19 × 107 × 1061 × 4241 × 7369121 × 213831257 × 4239894319 × 244148373164317<15> × 1198108158698393<16> × 18219491741615249<17> × 144828226935207572844491<24> × 1525232544818439249731353<25> × 611377519547404867517081636645240928757<39> × 11493496766783206018490283171055972341523<41> × 46950348182128332126379933709499018110168129345669111329<56> |