n!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 298: | \[298!!!!+1\] | 151 × 283 × 29292314369<11> × 17819522508010080133<20> × 143806791882168069171722799656577337672158977<45> × 717941663884510118288883692219195733896802001212076845150122383072551616993<75> |