Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 234: | \[{20^{234}-1\over19}\] | 33 × 7 × 79 × 127 × 307 × 421 × 1171 × 2081 × 2549 × 3121 × 69481 × 142559 × 363871 × 1340743 × 9690539 × 15359527 × 31711447 × 64008001 × 571945141 × 735408649 × 22969682841393367<17> × 278330926147861118689<21> × 172311318287603732461390609<27> × 50676846610970769808122928009<29> × 34838432418391303086607495276007140943047729735536037126561<59> × 256063908633871845537541706060016525021086384110684477035559<60> |