n!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 138: | \[138!!-1\] | 2083351274033<13> × 139862567109981982871563703<27> × 238112603840065527932108510939<30> × 1455895871427425478972958685431157828872114896729259<52> |