n!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
164: | \[164!!+1\] | 83 × 167 × 1794155042758734611<19> × 92433990940948118981594470114517211354204477732312999635162813426150617552434169588113763344463946563865521505385733996448831<125> |