Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 266: | \[{20^{266}-1\over19}\] | 3 × 72 × 19 × 29 × 71 × 827 × 2129 × 10529 × 32719 × 75368484119<11> × 109850818001<12> × 192696104561<12> × 2272727294381<13> × 6174163589791<13> × 8776164666072488886789698957877451<34> × 2672419181885638588413640317577254742085726012350062127894360278809061606258187035774281129<91> × 340744481075141437282359508736373371317243871454393861638272328413785695424365535645344914877074285703257280374330249707554406399973120000021<141> |