Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 238: | \[{20^{238}-1\over19}\] | 3 × 72 × 29 × 71 × 239 × 827 × 2381 × 3571 × 6427 × 10529 × 32719 × 2567783 × 2640509 × 8003227 × 34297229 × 92054423 × 2740419347 × 175009643475509587529<21> × 689852631578947368421<21> × 324327747852167804669527<24> × 303160980380836871520393054840178101666532392936293381<54> × 37038726233519411473987238813761667130865753406913436234898939276876292520358116802385012861293706006173632328171029<116> |