tables > repunit > 4

Base 4 Repunits

Table

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

51: \[{4^{51}-1\over3}\] 3 × 7 × 103 × 307 × 2143 × 2857 × 6529 × 11119 × 43691 × 131071

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