<P> As a consequence of the first point, if a and b are coprime, then so are any powers a and b . </P> <P> If a and b are coprime and a divides the product bc, then a divides c . This can be viewed as a generalization of Euclid's lemma . </P> <P> The two integers a and b are coprime if and only if the point with coordinates (a, b) in a Cartesian coordinate system is "visible" from the origin (0, 0), in the sense that there is no point with integer coordinates on the line segment between the origin and (a, b). (See figure 1 .) </P> <P> In a sense that can be made precise, the probability that two randomly chosen integers are coprime is 6 / π (see pi), which is about 61% . See below . </P>

What do you mean by co prime number