Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 300: | \[{20^{300}-1\over19}\] | 32 × 7 × 11 × 13 × 31 × 41 × 61 × 101 × 127 × 151 × 251 × 401 × 421 × 601 × 1451 × 2801 × 3001 × 11251 × 12277 × 71161 × 152381 × 222361 × 261451 × 1369801 × 7466201 × 46794901 × 55191001 × 167283841 × 26876632021<11> × 51051875401<11> × 4273193518996201<16> × 9308203137060768572251<22> × 795206712572651793400201<24> × 1038193734970398415809901<25> × 50400599307654932765408401<26> × 104988737576990732806404001<27> × 10995116277758926258176000104857599999989760000000001<53> × 252956092360736726050029744523589053405891255557488752659947733231006887119201<78> |