tables > repunit > 21

Base 21 Repunits

Table

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

271: \[{21^{271}-1\over20}\] 1048090723753746091939209979081854572641794279472108695978632265392773944236247669962740673351139515840409097890217021915331532061249449874279389843906549720692969399074776816755255143380606646105620121737471133425339230683248800147226176750767409789702089666751439799940105050725207874292584334558786272782953671925865118220122617593753735938991276065433971<358>

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