Base 32 Repunits
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
53: | \[{32^{53}-1\over31}\] | 6361 × 69431 × 20394401 × 29324808311<11> × 197748738449921<15> × 36614110124735294634435619027766763481<38> |