Let \( U \) be set with number of elements in it is 2009 . \( A \) ...

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Let \( U \) be set with number of elements in it is 2009 . \( A \) is a subset of \( U \) with \( n(A)=1681 \) and out of these 1681 elements, exactly 1075 elements belong to a subset \( B \) of \( U \). If \( n(A-B)=m^{2}+p_{1} p_{2} p_{3} \) for some
P positive integer \( m \) and distinct primes \( p_{1}p_{2}p_{3} \) then for least \( m \) find \( \frac{p_{1} p_{3}}{p_{2}} \)

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