tables > repunit > 21

Base 21 Repunits

Table

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

* 307: \[{21^{307}-1\over20}\] 5527 × 130783 × 84034169353<11> × 89796173969067084544477033<26> × [76478433455881480684406175866481547405920294576828292856176746964521798616295069036009361575063024105121141641208708068979692176333332126763915795242098737391016428867412239324370531432908041730875539361644302574237073062034344509696093088291723249740095159794462657601857304271394678529368012520408020825050637270530181977724206982682457312639425509556873303<359>]

Index range: 307 – 307 << prev next >>