Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 273: | \[{20^{273}-1\over19}\] | 29 × 71 × 79 × 421 × 1171 × 3121 × 32719 × 142559 × 460951 × 9690539 × 8442733531<10> × 1296621829750174201<19> × 172311318287603732461390609<27> × 104933918101562798067516186656513621<36> × 42753079684768103157355121804168940801106384712792554767161<59> × 18102066280681629086435560861714306987902359207503451153309865612516692198843609395347384147887744153973812244720840668815536684083974856521587674043727343498213963102221<170> |