6

This number is a composite.

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

+ F0*F1*F2*...*F6*(F6 - 1) - 1 is prime, where Fn denotes the nth Fermat number. [Wesolowski]

+ (1# + 2# + 3# + 4# + 5# + 6#) is one-half of pi(1! + 2! + 3! + 4! + 5! + 6!). [Wesolowski]

+ pi(6!) = 2! + 3! + 5!. [Wesolowski]

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