EN
T. Cochrane and R. E. Dressler [CD] proved that the abc-conjecture implies that, for every 𝜀 > 0, the gap between two consecutive numbers A<C having the same prime factors is ≫ $A^{1/2-𝜀}$. In the present paper, from a weak effective form of the abc-conjecture we deduce that A-C > $A^{0.4}$ with two exceptions given in Table 2.