n# - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
53: | \[241\#-1\] | 389 × 89644308483145450484697016758269<32> × 7342390217536879111656170866328130575089802700065339680592709569<64> |