Cremona's table of elliptic curves

28980 = 2² · 3² · 5 · 7 · 23

Class	r	Atkin-Lehner	Eigenvalues
28980a (1 curve)	0	2- 3- 5+ 7+ 23-	2- 3- 5+ 7+  5  4 -2  5
Curve Equation t 28980a1 [0,0,0,-218933328,-5078144713052] 1
28980b (1 curve)	0	2- 3- 5+ 7+ 23-	2- 3- 5+ 7+ -5  1  3 -4
Curve Equation t 28980b1 [0,0,0,26952,-1795372] 1
28980c (1 curve)	0	2- 3- 5+ 7- 23+	2- 3- 5+ 7-  2 -1  8  2
Curve Equation t 28980c1 [0,0,0,920067,-218177507] 1
28980d (1 curve)	1	2- 3- 5+ 7- 23-	2- 3- 5+ 7-  1  4 -6  7
Curve Equation t Generators 28980d1 [0,0,0,-10128,392852] 1 [61:45:1]
28980e (2 curves)	1	2- 3- 5+ 7- 23-	2- 3- 5+ 7-  6 -1 -6  2
Curve Equation t Generators 28980e1 [0,0,0,-23695293,-44395733783] 1 [5969226384:200411480375:970299] 28980e2 [0,0,0,-23456793,-45333186383] 3 [43341:8963905:1]
28980f (2 curves)	1	2- 3- 5- 7+ 23-	2- 3- 5- 7+  2  0  2 -2
Curve Equation t Generators 28980f1 [0,0,0,-32952,2301329] 2 [98:115:1] 28980f2 [0,0,0,-27327,3112454] 2 [-137:2070:1]
28980g (1 curve)	1	2- 3- 5- 7+ 23-	2- 3- 5- 7+  6 -5  2 -2
Curve Equation t Generators 28980g1 [0,0,0,-117,-999] 1 [16:35:1]
28980h (2 curves)	1	2- 3- 5- 7- 23+	2- 3- 5- 7-  0  2 -2 -6
Curve Equation t Generators 28980h1 [0,0,0,-496992,134856601] 2 [402:175:1] 28980h2 [0,0,0,-496767,134984806] 2 [215:6174:1]
28980i (2 curves)	1	2- 3- 5- 7- 23+	2- 3- 5- 7-  3 -4 -6 -1
Curve Equation t Generators 28980i1 [0,0,0,161088,16366516] 1 [797:25515:1] 28980i2 [0,0,0,-3415872,2464527364] 3 [1013:-6615:1]
28980j (2 curves)	0	2- 3- 5- 7- 23-	2- 3- 5- 7- -4  6  6  6
Curve Equation t 28980j1 [0,0,0,-90912,-10550059] 2 28980j2 [0,0,0,-85287,-11912434] 2

Data from Elliptic Curve Data by J. E. Cremona.
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