n# - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
54: | \[251\#-1\] | 565921 × 91679677 × 15700021586055397160311310308325895690972977<44> × 78895888605502981375277514467299502661142681<44> |