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Old 2017-03-03, 14:32   #7
EdH
 
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"Ed Hall"
Dec 2009
Adirondack Mtns

418510 Posts
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Quote:
Originally Posted by fivemack View Post
If you were stepping along the two sequences in perfect sequence, it's just a problem in quadratic equations; but the variable stepping rates make it much more difficult.

You're looking for a point on the conic Y^2-N=X^2, and there are good ways to do this iff you know the factorisation of N :)
Thanks fivemack! This gives me an area for my next study...
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