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min of abc when a>b>b, primes, a=b+2c, a + b + c is perfect square

Source: INAMO Shortlist 2015 N1

May 14, 2019
number theoryPerfect Squaretripletsprimes

Problem Statement

A triple integer (a,b,c)(a, b, c) is called brilliant when it satisfies: (i) a>b>ca> b> c are prime numbers (ii) a=b+2ca = b + 2c (iii) a+b+ca + b + c is a perfect square number Find the minimum value of abcabc if triple (a,b,c)(a, b, c) is brilliant.