n!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
| 261: | \[261!!!-1\] | 283 × 1319 × 26449 × 38231 × 703123 × 67433466137126687658421<23> × 4843966385821799330979763683526529<34> × 7859695269923871460911195767369278457157317484900098048847369453374738771480637410023328943273139<97> |