Base 20 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 568: | \[{20^{568}-1\over19}\] | 3 × 7 × 401 × 569 × 5113 × 17041 × 160001 × 53827373 × 86538209 × 595705337 × 764253089 × 3068721247 × 201161092255316201234202042361<30> × 496641441599935258407636234413<30> × 3389724375173873063832460218247<31> × 1899661864476214974784422964016709719864855214061<49> × 662247334433686993635651204693256092552098489826256721<54> × 61777752739108975259079961779208763786873373427879250247440461<62> × 460843615810484255929284510273557393889324216008345540739853468610844181393388120664809<87> × [96436997912678848137963371191596184822851247344751984378894821236922391086939107607101493100565048497514290627814098986028643936534553521288030615378473335558970780277495507713596908896598400190035271743801143187838581271153615506926809515945642120809237328227764064282746130271940139286573386081250376734007638288836125536102777136721<335>] |