Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 329: | \[{20^{329}-1\over19}\] | 29 × 71 × 659 × 1129 × 4889 × 32719 × 790551835729<12> × 1930941642781<13> × 271003351485155759<18> × 87910897915022054334374219609<29> × 645865865692276592940999878687111387406668498773680096176014368962676968551715117514442286125433058012834864313571165312945981444322223846388460263026425896783085138036483653539686112152581543847372229680205313174552820545033193986297089031348767004492707569700045070451263395000300038510845765963721503788235141377783435290076799162410801<339> |