tables > repunit > 21

Base 21 Repunits

Table

Viewing: 687 – 687 << prev next >>

(available: 0-999)

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

* 687: \[{21^{687}-1\over20}\] 463 × 9161 × 74200123 × 234609127 × [3351549324546723078940572336818223388028213924516940504874239858417490791041217197519814155568521945445832782330408561839723257050665299602503936542311868204017040122108636703563107050139317972588940174476587335646101344261575178029952957348373321974189262095893825870412395946639875585670001169509<298>] × [46784982185842883889555725384088582407296460473739891608557580240070258592185249399312552991351565569980112939950578420212698457931161816599506860520936291463313657162378600028859787192971964078374368535577262215091447897025143156229364758851702523028711898574092143597579572020701612978620789484214917086662104749156265310769109645941585304471903697756019793828261505405530781108248841477146806100285622113380928744742713600465255643455129224851448369987525583685422499664090570124826962145569326007294701759744281506538771884750019161512157847618169637159395943897901087347598043582341<587>]

Index range: 687 – 687 << prev next >>