tables > repunit > 21

Base 21 Repunits

Table

Viewing: 55 – 55 << prev next >>

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

55: \[{21^{55}-1\over20}\] 5 × 881 × 40841 × 5664205361<10> × 17513875027111<14> × 270573999780463721<18> × 54598616218616435702441<23>

Index range: 55 – 55 << prev next >>