Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 658: | \[{20^{658}-1\over19}\] | 3 × 72 × 29 × 71 × 659 × 827 × 1129 × 4889 × 6581 × 6863 × 10529 × 32719 × 64109 × 790551835729<12> × 1930941642781<13> × 6122033223881<13> × 271003351485155759<18> × 87910897915022054334374219609<29> × 1523201995370741149853911341808474202883334149728543<52> × 645865865692276592940999878687111387406668498773680096176014368962676968551715117514442286125433058012834864313571165312945981444322223846388460263026425896783085138036483653539686112152581543847372229680205313174552820545033193986297089031348767004492707569700045070451263395000300038510845765963721503788235141377783435290076799162410801<339> × [3164320967890087432897280068149315246524405536047928985128073232638460706515536225492090040022922079841854510045525177484842883527713636005583809847550335085068992573576439284251028232686341710892274071341782828929735687046625307701081476890210771869703201076109588690566178928069077183962061349862354408028068167342062658973860025308737737561<343>] |