tables > repunit > 21

Base 21 Repunits

Table

Viewing: 23 – 23 << prev next >>

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

23: \[{21^{23}-1\over20}\] 47 × 19597 × 139870566115103282847737<24>

Index range: 23 – 23 << prev next >>