n!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 147: | \[147!!-1\] | 2 × 233 × 877929873192299951779968833717894275638648282801258667012377318553946487466679987789470280652014138875517174951422654508009489<126> |