In effect, the conjecture says that every rational elliptic curve is a modular form in disguise. Or, more formally, the conjecture suggests that, for every elliptic curve y^2=Ax^3+Bx^2+Cx+D over the rationals, there exist nonconstant modular functions f(z) and g(z) of the same level N such that
[f(z)]^2=A[g(z)]^2+Cg(z)+D.