Base 19 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 187: | \[{19^{187}-1\over18}\] | 104281 × 999329 × 3044803 × 62060021 × 99995282631947<14> × 5885466130954928395597963<25> × 177635506439112568277872908274123633102790712474537364888480666680213335541285954022697<87> × 3614730492828723249131533107708862663109996946833811334836120379563790789854472581224779<88> |