485144

This number is a composite.

Just showing those entries submitted by 'Firoozbakht': (Click here to show all)

485144 = prime(4+4!)+prime(8+8!)+prime(5+5!)+prime(1+1!) +prime(4+4!)+prime(4+4!). Note that 485144 is the only number with this property. [Firoozbakht]