Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 219: | \[{18^{219}-1\over17}\] | 73 × 439 × 1753 × 239879 × 846217 × 2365639 × 118874953 × 11383623350263<14> × 131810412947119<15> × 1072594055045813611874580077401872607<37> × 481104519238506706023038356717847285426724631<45> × 1689881210594959734561206581234718317336275681611939282381056297<64> × 239560437299594270561494729006400795838750182585371182921815375952671<69> |