Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 369: | \[{20^{369}-1\over19}\] | 421 × 739 × 5915809 × 64008001 × 7925836394865601<16> × 175887076296565741<18> × 10401409500894667501<20> × 788985829969499330639<21> × 19850094536448035972954342201<29> × 7921479827613016854472711513630655096419788523581541<52> × [298627999805054130949182932576588389135921174772394906852405886011866355042552206924078190098573203146251600690548589650718350068432970000845927986873991984733653036061113388206573677581998401124450919211291791960773703220904198949320832155086673374744209995904344299301344526571495754156888794752485165089<306>] |