Base 7 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 668: | \[{7^{668}-1\over6}\] | 24 × 52 × 84609883 × 94101829 × 2158061509 × 18840106986299<14> × 819417374559877<15> × 3410050832187001<16> × 623932374204290945359<21> × 1818175798347430018651001<25> × 17032461718357654839264111701<29> × 494816894793945434195756741367539<33> × 10040602017744492674656445006670844373591530219340342366222351894137<68> × 338513172571109809642331758494895401592995616753557786006393013119421851044473<78> × 129500983864777335824439136885253501106338876904724620439360673626754032480325211085154679608596168727627<105> × 367065354619770733887545790923590166068740555071032752199020736909500209616870012263577937238683699794462673532570810003114562379796881729<138> |