n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 284: | \[284!!!!-1\] | 3873509365723<13> × 407741932092763<15> × 2320703012153287<16> × 9460542184256912937823892947284746771903<40> × 136740508093984750103932164390153087776847909006962056058920591<63> |