Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 185: | \[{18^{185}-1\over17}\] | 41 × 2711 × 157991 × 140077676551<12> × 10375318069755905859690041706382489471961<41> × 38730085117125035112107708769154901750521615897400877652942713140687885342051386403743167128498300965642638172768310991039407167641473739445583036102643748792308300708601<170> |