Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 186: | \[{18^{186}-1\over17}\] | 73 × 19 × 307 × 311 × 1427 × 12959 × 52081 × 70619 × 48274627 × 1276827537047<13> × 9365578696924149281<19> × 2031563183945918294071<22> × 361794341647699905505399<24> × 51124582874452705456885351<26> × 427906142457974033788659934939<30> × 45293722407512817896780402744247731666953965187247229205664466514537<68> |