Cremona's table of elliptic curves
Conductor 639
639 = 3
2
· 71
Isogeny classes of curves of conductor 639
[newforms of level 639]
Class
r
Atkin-Lehner
Eigenvalues
639a
(2 curves)
1
3
-
71
-
-1
3
-
-2
2
0
-2
0
0
Curve
Equation
t
Generators
639a1
[1,-1,1,4,-34]
2
[6:10:1]
639a2
[1,-1,1,-131,-520]
2
[-6:7:1]
Data from
Elliptic Curve Data
by J. E. Cremona.
Design inspired by
The Modular Forms Explorer
by William Stein.
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Computational Number Theory
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