tables > repunit > base13

Base 13 Repunits

Table

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

256: \[{13^{256}-1\over12}\] 28 × 5 × 7 × 17 × 193 × 257 × 1601 × 2657 × 10433 × 14281 × 96769 × 441281 × 2940673 × 3230593 × 283763713 × 407865361 × 36713826768408543617<20> × 68675120456139881482562689<26> × 3215877717636198473712500018174097551256193<43> × 67536120924735951516345457060094012820258764442154891883391212189471888997555709868450756307490347724768564292389027527834924029953<131>

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