Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 322: | \[{20^{322}-1\over19}\] | 3 × 72 × 29 × 47 × 71 × 461 × 691 × 827 × 1381 × 10529 × 32719 × 563041 × 1379449 × 11637469336963<14> × 53256918961009<14> × 147667502589881<15> × 3274400525856244223<19> × 141682646883922306961<21> × 46266279097921483078651<23> × 376625253722542687705967089659406933479650879094369030258305449<63> × 6673573209932823343535188105625591536422674379980039710739560694896247<70> × 657691252165510493074624994632492243498673308228545296980038834474336097170339517449163138480478010357544188164791431526046700863719160527514789<144> |