n!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 207: | \[207!!+1\] | 2 × 277 × 367 × 32693 × 30008731429<11> × 70932756619177<14> × 738678775959049<15> × 55755138534562514087<20> × 19807794541324032490095594031699828487673400645317560164395681371289707684779402451195927786520606768537338624309302781381875781<128> |