Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 462: | \[{20^{462}-1\over19}\] | 32 × 72 × 23 × 29 × 43 × 67 × 71 × 127 × 421 × 463 × 661 × 827 × 859 × 10529 × 32719 × 38149 × 460951 × 573343 × 2750161 × 3049927 × 36363727 × 8442733531<10> × 424016563147<12> × 10778947368421<14> × 14121717629581<14> × 35744795971855279<17> × 16474951755182030881<20> × 175462044485240500219<21> × 2099063214555795129181<22> × 11591111347512862858060061<26> × 94492701984716091424823399007224633473246602866536721<53> × 1210567578891427492816561347489923627502617025084966049153058402099173120000021<79> × 137917472470285633611973702173893252060618988245295231715947158248930947419345734655229138583152229070589169<108> × 39138913132199507495947600247705325602944946553226723264829143232526019048726568203003486009251509340280449319683255125223883079211239768299<140> |