Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 403: | \[{20^{403}-1\over19}\] | 311 × 3121 × 11161 × 142559 × 1646101 × 9690539 × 340037881769<12> × 581740080393079<15> × 2160706836716944126651<22> × [1032585918515988433790347231626073253759733983220066820950587338915919383543742808808501971809126273875508066297168586310795091081131219468523622439053734351086688221808829889377417460575186916103902084536249066613590437355236586182034183642361398976137376410088299473811329019062138203749457899595754209585240105099085002536979583610419101318012848364073285579352143742698140225921675303057645691764235949693221266897943093546390941685556230803831<448>] |