Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 430: | \[{20^{430}-1\over19}\] | 3 × 7 × 11 × 61 × 251 × 431 × 947 × 1721 × 9461 × 14621 × 152381 × 234781 × 1235821 × 4248401 × 369122321 × 4560331031<10> × 1191064120801<13> × 57098317360801<14> × 2806376675907539257781<22> × 16382282349203301699052609943551<32> × 341123703105313974607376880614995646376367361<45> × 12541974245083294274833711773684280721275134101<47> × 4423036668279780761301352642429727962990898576959823<52> × 1463629744199003047595242254167478561504495136622906450988463958940955737371<76> × [155080378200955986866046644765266550351845224238638685469723584067897265758802295532485419994825587861024340325949657834217930925787225713843092110296472877340446905622781725628759061422105698220081<198>] |