Cremona's table of elliptic curves

19803 = 3 · 7 · 23 · 41

Class	r	Atkin-Lehner	Eigenvalues
19803a (4 curves)	1	3+ 7+ 23- 41-	-1 3+  2 7+  4 -2 -6  4
Curve Equation t Generators 19803a1 [1,1,1,308,3404] 4 [155:7556:125] 19803a2 [1,1,1,-2337,34086] 4 [-27:293:1] 19803a3 [1,1,1,-11652,-457746] 2 [181:1754:1] 19803a4 [1,1,1,-35342,2542466] 2 [1670:15781:8]
19803b (1 curve)	0	3+ 7- 23+ 41+	0 3+  0 7-  3  4 -5 -6
Curve Equation t 19803b1 [0,-1,1,-7953,-270355] 1
19803c (1 curve)	1	3+ 7- 23- 41+	0 3+  0 7- -1  4 -1  2
Curve Equation t Generators 19803c1 [0,-1,1,-343,7491] 1 [3:80:1]
19803d (2 curves)	0	3+ 7- 23- 41-	1 3+  4 7- -6 -2  6 -4
Curve Equation t 19803d1 [1,1,0,782,-8945] 2 19803d2 [1,1,0,-4753,-91970] 2
19803e (1 curve)	1	3- 7- 23+ 41+	-1 3-  3 7- -2 -7 -2  7
Curve Equation t Generators 19803e1 [1,0,0,-118349,-15681078] 1 [469:5425:1]

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

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