n!!!!! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
290: | \[290!!!!!+1\] | 59 × 97 × 107 × 809 × 2557 × 3596449 × 50169376189<11> × 11478927243599<14> × 31083588813306719628616510434557674867473193104916289327669816591289168987463<77> |