tables > repunit > 20

Base 20 Repunits

Table

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

40: \[{20^{40}-1\over19}\] 3 × 7 × 11 × 41 × 61 × 251 × 401 × 2801 × 148721 × 152381 × 160001 × 222361 × 4406613081041681<16>

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