Base 18 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 135: | \[{18^{135}-1\over17}\] | 73 × 31 × 41 × 271 × 601 × 991 × 2711 × 23761 × 34327 × 253369 × 558721 × 1464049 × 2293111 × 4464073 × 157538228874391<15> × 19604926044098138791<20> × 2267163273850729470001<22> × 550797593658000576635951641<27> × 1338029376807245057016053427001<31> |