Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 236: | \[{20^{236}-1\over19}\] | 3 × 7 × 401 × 709 × 11560933 × 32031477011<11> × 2505995335981<13> × 32918292739957<14> × 60435208609469<14> × 50552666868943321<17> × 4443043113983919668779<22> × 594796417554507257525081<24> × 18125089740981918851143613362611829740110227944229<50> × 1369179763419338592589837489227272683410286422082537721<55> × 15903930044823218118630473140438215500707417264159317312676215460605606768401<77> |