Base 31 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 58: | 25 × 59 × 349 × 10789 × 49823 × 1838659 × 1482570191 × 11242578713<11> × 189343400041<12> × 1671541885847<13> × 3061037680116618496603<22> |