n!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
158: | \[158!!+1\] | 493049 × 71622183823<11> × 22576527443783513<17> × 678285618650874964720978361347159763698913827289919929602993110928897691853189977117571412469106159931530751<108> |