n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
* 309: | \[309!!!!-1\] | 22 × 128693 × 21063931013<11> × [1001292716717143368175867696804959151485299432866731774067245796049790457844376261275586669097181767871365437442920854167982757420130387060522559<145>] |