Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 190: | \[{31^{190}-1\over30}\] | 25 × 5 × 11 × 41 × 191 × 571 × 14251 × 17351 × 21821 × 793926617318201<15> × 88770666332610762169<20> × 3545592640701962728192781<25> × 235142933140869317522523932575601<33> × 1048330675890970980558211290027338631509637409328179940986395704179139806481<76> × 291085900456038886134880893459441846658670815367779265015895596556789125915380655528060127881<93> |