tables > repunit > 21

Base 21 Repunits

Table

Viewing: 681 – 681 << prev next >>

(available: 0-999)

Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>

* 681: \[{21^{681}-1\over20}\] 463 × 27241 × 2217967631679979<16> × 2381728652272273567<19> × 2646531892461378714335381<25> × 26307087968534536492435242740004010840943942590798885871148425394113792980077092659997460806684342719378550896650637248771026433450955627842768759916085264300859428543370123948394983256199640706235988774243966026348167416301453163054427612057896242226915201929481038443667187<275> × [29101025051252502723320476415856699075759476223746935889511259309245075023319067040802098534230781165738344827919761349965832647051145876522556744831652697442315099085759369370908007338364055945987380425768457886058673609564212998800313585026355567606002883267482040107958994133086398683429862290364995467099667598082405125562653378796911489239853708010557515748065754233384232758369401005899093366593330263259277002150291760507343688105949066688985610274290258814088424376054186610718464419695304935031477277641544482802950287908158406860348492219956940846317<560>]

Index range: 681 – 681 << prev next >>