Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 161: | 29 × 71 × 691 × 1381 × 32719 × 53256918961009<14> × 147667502589881<15> × 46266279097921483078651<23> × 657691252165510493074624994632492243498673308228545296980038834474336097170339517449163138480478010357544188164791431526046700863719160527514789<144> |