tables > repunit > 21

Base 21 Repunits

Table

Viewing: 521 – 521 << prev next >>

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

* 521: \[{21^{521}-1\over20}\] 17691077 × 980093286656242243<18> × [216870696143297781661431860385768254320546397457291329288238173502814001420583065576610410526805920594605156645796653066089165744076414213078842259568320330407743868068970212681797165028063926848507228895519810896715387289891958181259580285997338113161744020981940955474491449213035418911352879126878844181917862959740001598790818392030363761444956277353707594970147192201280122673986126842064320690194092540504814897281439651640793034625059133225798821805348923373269063476343928936829131362832572620043668146659922426317451065503382591866663262582607137294045316684376699345618864573836294750718050322993427926265449096201961608588559806877095477209242387309911<663>]

Index range: 521 – 521 << prev next >>