n! + 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
87: | \[87!+1\] | 4663 × 13410869 × 97090839750280792098055480829286160009<38> × 347152269422155606109072178995340235243474762379877515213108858425955083504244654387<84> |