Cremona's table of elliptic curves

620 = 2² · 5 · 31

Class	r	Atkin-Lehner	Eigenvalues
620a (2 curves)	1	2- 5+ 31-	2-  1 5+ -4  0  2 -3 -7
Curve Equation t Generators 620a1 [0,1,0,-101,359] 3 [2:13:1] 620a2 [0,1,0,59,1495] 1 [-6:31:1]
620b (2 curves)	1	2- 5- 31+	2-  0 5- -2 -4 -4  0  0
Curve Equation t Generators 620b1 [0,0,0,-1052,13129] 2 [-12:155:1] 620b2 [0,0,0,-1207,9006] 2 [-13:150:1]
620c (1 curve)	1	2- 5- 31+	2- -3 5- -2  2  2 -3 -3
Curve Equation t Generators 620c1 [0,0,0,8,4] 1 [0:2:1]

Data from Elliptic Curve Data by J. E. Cremona.
Design inspired by The Modular Forms Explorer by William Stein.

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