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# 180

This number is a composite.

180 can be represented by the product of the squares of the first two primes times the sum of the first two primes. [Sladcik]

The product of first four triangular numbers (i.e., 1*3*6*10) is the largest known n of this type such that n+1 and n-1 are twin primes. [Gupta]

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