503382
This number is a composite.
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(6!)^2 - (5!)^2 - (4!)^2 - ( 3!)^2 - (2!)^2 - (1!)^2 - (0!)^2 = 503382, which falls between a twin prime pair. [Bajpai]
Submitted: 2016-03-29 18:46:54; Last Modified: 2020-06-16 00:12:25.
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