Base 3 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 403: | \[{3^{403}-1\over2}\] | 683 × 102673 × 797161 × 4404047 × 121674645534469<15> × 14392455313096812239313539411<29> × 2209152684754095419251714657365370471168168676857997421281883896411749177423871120561517300890295224461977125179137945711695818319<130> |