Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 380: | \[{31^{380}-1\over30}\] | 26 × 5 × 11 × 13 × 37 × 41 × 181 × 191 × 571 × 1217 × 14251 × 17351 × 21821 × 1041961 × 23126269 × 53489941 × 2491389137 × 4707206941<10> × 27268386181<11> × 793926617318201<15> × 88770666332610762169<20> × 3545592640701962728192781<25> × 130154580611883020628409201<27> × 263317918781112724232562595981<30> × 312549733680624490635452686781<30> × 235142933140869317522523932575601<33> × 1048330675890970980558211290027338631509637409328179940986395704179139806481<76> × 291085900456038886134880893459441846658670815367779265015895596556789125915380655528060127881<93> × 24413224770432171924698720004070546256752741122955844587268816994736332064297295414941993128850321519800984854768023378286698331112024202061<140> |