n!!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 296: | \[296!!!!!+1\] | 899447 × 480403658381<12> × 4547581934519663752233824491<28> × 77782655670578956957329599076301<32> × 388272290780546861114355406674205473689222221<45> |