tables > repunit > base2

Base 2 Repunits

Table

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

256: \[2^{256}-1\] 3 × 5 × 17 × 257 × 641 × 65537 × 274177 × 6700417 × 67280421310721<14> × 59649589127497217<17> × 5704689200685129054721<22>

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