n!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 206: | \[206!!-1\] | 229 × 751 × 3761 × 96764217592712077<17> × 2408379976918007473<19> × 6662441801348322259759350222108143042717840742102172669681090840249649658935415569717265337890316320137694568545589898727195741163002773589776614950001<151> |