503382

This number is a composite.

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

(6!)^2 - (5!)^2 - (4!)^2 - ( 3!)^2 - (2!)^2 - (1!)^2 - (0!)^2 = 503382, which falls between a twin prime pair. [Bajpai]