Base 21 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 595: | \[{21^{595}-1\over20}\] | 5 × 43 × 631 × 1471 × 3319 × 14281 × 40841 × 44983 × 4149601 × 20028751 × 421503321597121<15> × 2472998114541151<16> × 1502097124754084594737<22> × 521385310316460664253576251<27> × 1413344447066858221674320311<28> × 2799538602198455356994757392557147<34> × 228981930777446745490310485965805923037<39> × 11500287881306297400572689205013166485061<41> × 346846213951614446714019035689488886491130381<45> × 19822950076647947256661837016844167085154211713<47> × [3110052906671261718664921186597933817165276045087037666664531905929369328243378001773604446902893338196566651234449752454986750405221496259037142946638516107239981005357196873955438525915707823382002988695240752438586993026819832332587879882235427666984541249579935221608424412516465707352921228574486035545039443068396221879341025066316372673589942951495314702908894791279852646631287015815487845929657130547967196416596990014911233246331<439>] |