Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 344: | \[{20^{344}-1\over19}\] | 3 × 7 × 173 × 401 × 947 × 1033 × 2237 × 160001 × 369122321 × 1887652357 × 2593691596542044913493<22> × 12541974245083294274833711773684280721275134101<47> × 4423036668279780761301352642429727962990898576959823<52> × 10183165864042489505744319341840444146171123988044014091683098589378219601<74> × 362189816813849315242499305701090048760204668858143934761104742127307493292348917010943415388745785488889097153694580309163483991535798303003103810465657000098734862093946375565065593461047644831697052619461786640697<216> |