tables > repunit > 21

Base 21 Repunits

Table

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

* 233: \[{21^{233}-1\over20}\] 467 × 12583 × [1016165860675466224435667359050460837917699907631519871747511444929133654047039955673511744690228028435478182457077062748965764966822216325517576262436357409335425593701220103471401341114770699280134984504106268400184236016896734086511626719679407704104624954200104490412993903136378797102142699943813<301>]

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