Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 104: | 3 × 7 × 53 × 401 × 937 × 2081 × 2549 × 3121 × 142559 × 160001 × 502321 × 1961441 × 9690539 × 735408649 × 26916259659749909489<20> × 628605693732325702045277<24> × 5689937922777603987891003780559177<34> |