Cremona's table of elliptic curves

28509 = 3 · 13 · 17 · 43

Class	r	Atkin-Lehner	Eigenvalues
28509a (2 curves)	1	3+ 13+ 17+ 43+	-1 3+  0 -4  2 13+ 17+ -4
Curve Equation t Generators 28509a1 [1,1,1,-10713,360918] 2 [-92:806:1] 28509a2 [1,1,1,-47048,-3592330] 2 [-135:634:1]
28509b (2 curves)	0	3+ 13+ 17+ 43-	1 3+  0  4 -2 13+ 17+ -4
Curve Equation t 28509b1 [1,1,0,-2680,35467] 2 28509b2 [1,1,0,-39015,2949534] 2
28509c (2 curves)	2	3+ 13- 17- 43-	-1 3+ -4 -4  0 13- 17-  2
Curve Equation t Generators 28509c1 [1,1,1,-50,-154] 2 [-4:2:1]&[11:22:1] 28509c2 [1,1,1,-115,236] 2 [-10:27:1]&[-4:27:1]
28509d (2 curves)	1	3- 13+ 17- 43+	1 3-  2 -2  2 13+ 17- -2
Curve Equation t Generators 28509d1 [1,0,1,-130755,-14981159] 2 [13419040:7637481:32768] 28509d2 [1,0,1,-1987220,-1078364311] 2 [13038:21629:8]

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

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