This article is rated Stub-class on Wikipedia's content assessment scale. It is of interest to the following WikiProjects:

Mathematics Low‑priority This article is within the scope of WikiProject Mathematics, a collaborative effort to improve the coverage of mathematics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.MathematicsWikipedia:WikiProject MathematicsTemplate:WikiProject Mathematicsmathematics Low This article has been rated as Low-priority on the project's priority scale.

If this is correct (and the linked Elliptic Curve Data by John Cremona lists conductors as integera), then it would improve the readability of this article by a factor of one million if this were stated clearly.

And if some examples of this were included.

The urge to define every mathematical concept only in maximum generality is what makes mathematics articles in Wikipedia far, far worse than they need to be.