56

This number is a composite.

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

+ The product of all composite numbers up to 56 (i.e., compositorial 56) plus 1 is prime. Note that this prime consists of 56 digits. [Gupta]

+ The smallest oblong number which is the product of two semiprimes. [Gupta]

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