Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 217: | \[{18^{217}-1\over17}\] | 311 × 449 × 12959 × 80207 × 296151602377<12> × 1276827537047<13> × 9449966564039<13> × 9365578696924149281<19> × 498615243782503808010044081653903<33> × 21191188860655091021909693302910310739730307884513<50> × 284028619618594510628275783444054913159352103860255892975179038764840168452635665552133575572089852319672358782721336447<120> |