n!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
* 331: | \[331!!!!+1\] | 23 × 31601 × 66643 × 248314770846629<15> × [238227938757515117570944485449855643009802143165668410164725118846850408189532348640625603654036820783218288267836251795019461537756494874985153419951<150>] |