n! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 81: | \[81!+1\] | 163 × 1129 × 13499 × 6459623 × 8625122129041099687<19> × 9769626895044196025426395684739<31> × 4287253800815216265504920327794605317629643150618968883<55> |