n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
266: | \[266!!!!-1\] | 199 × 439217 × 57182486412067703941<20> × 4114868697741748368569684315426442810767<40> × 2657018603825184237584890468739428791690369981556601657439042590699<67> |