Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 323: | \[{20^{323}-1\over19}\] | 19 × 134369 × 38136611 × 75368484119<11> × 192696104561<12> × 13222527711806339<17> × 689852631578947368421<21> × [6972791651644890346265458984337553514290090047011260649127962845814162682316067874628183788723291922206213469615084978127983825397083172758555529002034169127879611314764652440861823064618964844211585479670654108563665047149965302604311387857298425991862234046353895471079406954453277592110684654484218460507086815282324485635068632551433610245381<346>] |