Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
147: | \[{20^{147}-1\over19}\] | 29 × 71 × 421 × 1471 × 32719 × 460951 × 269737651 × 8442733531<10> × 2488859795549<13> × 6551154092925933298930251891324599<34> × 13149431066432694799534977107679246791059834401228556359210092801566281439371614848468492182188987082746431<107> |