tables > repunit > 21

Base 21 Repunits

Table

Viewing: 81 – 81 << prev next >>

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

81: \[{21^{81}-1\over20}\] 109 × 163 × 463 × 4779433 × 85775383 × 7429452749713<13> × 251097226443098886970664441840231990201201851332912023687544574398706423<72>

Index range: 81 – 81 << prev next >>