547

This number is a prime.

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

+ The largest prime concatenated from the only three single digits d for which d!+1 are perfect squares, i.e., 5!+1 = 11^2, 4!+1 = 5^2 and 7!+1 = 71^2. [Loungrides]

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