Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 276: | \[{18^{276}-1\over17}\] | 52 × 73 × 13 × 19 × 47 × 139 × 229 × 277 × 307 × 457 × 599 × 829 × 1381 × 3313 × 4831 × 84181 × 109297 × 415381 × 7468009 × 25753561 × 845970361 × 1234155529 × 20801237997245359<17> × 5184266309231761249<19> × 222068509026238060237<21> × 824418892380831861979<21> × 3913037558632733048069409307<28> × 47425584012916444409713229683<29> × 23119301658166980615359635821933664621<38> × 5724827604771643876354832533937769475429<40> × 3335831283765997129468848570484932171598514072932729<52> |