Base 21 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 332: | \[{21^{332}-1\over20}\] | 22 × 11 × 13 × 17 × 167 × 756131 × 941221 × 340541835197467124476215159811<30> × 59923443964076110556880753544175063<35> × 123598028795681525040744945941933185295442497<45> × 3933559749025343559773608835330553217577713594590920220509<58> × 2427465956748257333131174900008044102730428020614957536644912694343433239673<76> × 729527650594150495343539759329914839668448111479888558580722475314778092897956636213<84> × 23343519976297040387448341592997138604460338237413223529466429945751726176986579124533941307079<95> |