Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 245: | \[{20^{245}-1\over19}\] | 11 × 29 × 61 × 71 × 251 × 491 × 701 × 911 × 7841 × 23311 × 26951 × 32719 × 164011 × 5414011 × 12314191 × 269737651 × 2488859795549<13> × 3688539810341<13> × 13295107990361<14> × 80827057177254851<17> × 3951515322270922845411912871<28> × 6551154092925933298930251891324599<34> × 31786497905371763489242755077389209545831<41> × 77977622722548466932760552227685032371891<41> × 9094531444961429271893502102359397301142152534553291797831<58> |