Cremona's table of elliptic curves
Conductor 221
221 = 13 · 17
Isogeny classes of curves of conductor 221
[newforms of level 221]
Class
r
Atkin-Lehner
Eigenvalues
221a
(2 curves)
0
13
+
17
-
-1
0
4
-2
6
13
+
17
-
8
Curve
Equation
t
221a1
[1,-1,1,-733,7804]
2
221a2
[1,-1,1,-11718,491144]
2
221b
(2 curves)
0
13
+
17
-
1
2
2
2
-6
13
+
17
-
4
Curve
Equation
t
221b1
[1,1,0,-59,152]
2
221b2
[1,1,0,-54,185]
2
Data from
Elliptic Curve Data
by J. E. Cremona.
Design inspired by
The Modular Forms Explorer
by William Stein.
Part of
Computational Number Theory
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