n!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| * 269: | \[269!!-1\] | 2 × 4957 × 10259 × 1007654518761345953<19> × [5547131483814966196586917160673815452159732414621811489539072980623427437483360305954800922715940255763583380057132791904557558337285924596015890319806606966967282708177848524422295808783697607062598554387254474472544577425504527977857243799833<244>] |