n!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 228: | \[228!!+1\] | 239137 × 14738920897<11> × 509460401533<12> × 1750283255122267897123<22> × [16808548462860993808712517202619354236078906713267498444053851180400197789907928815899141930484027097331506606500015587488989610005727685151717544664045155006067978274204551<173>] |