Cremona's table of elliptic curves

121900 = 2² · 5² · 23 · 53

Class	r	Atkin-Lehner	Eigenvalues
121900a (1 curve)	0	2- 5+ 23+ 53+	2-  0 5+ -2  0  1  4 -4
Curve Equation t 121900a1 [0,0,0,-200,-1375] 1
121900b (1 curve)	0	2- 5+ 23+ 53+	2-  1 5+  2 -4  1  0 -4
Curve Equation t 121900b1 [0,1,0,142,-140587] 1
121900c (1 curve)	0	2- 5+ 23+ 53+	2-  1 5+ -2  0  5  4 -4
Curve Equation t 121900c1 [0,1,0,-410658,101153813] 1
121900d (2 curves)	1	2- 5+ 23+ 53-	2-  2 5+ -5  3 -5  0 -7
Curve Equation t Generators 121900d1 [0,-1,0,-16788,842552] 1 [-127:954:1] 121900d2 [0,-1,0,-48988,-3124488] 1 [-174:318:1]
121900e (1 curve)	1	2- 5+ 23- 53+	2- -1 5+ -4  6  7  0 -6
Curve Equation t Generators 121900e1 [0,-1,0,1842,2437] 1 [7:125:1]
121900f (1 curve)	1	2- 5+ 23- 53+	2- -2 5+  1 -3  6  3  4
Curve Equation t Generators 121900f1 [0,1,0,-2293,38823] 1 [74:529:1]
121900g (1 curve)	2	2- 5+ 23- 53-	2- -3 5+  0 -2  1 -6  4
Curve Equation t Generators 121900g1 [0,0,0,-1825,30625] 1 [19:53:1]&[0:175:1]
121900h (1 curve)	0	2- 5- 23+ 53-	2-  0 5-  1  6 -4  1 -4
Curve Equation t 121900h1 [0,0,0,-2585305,1599984825] 1
121900i (1 curve)	2	2- 5- 23+ 53-	2-  2 5- -1 -3 -6 -3  4
Curve Equation t Generators 121900i1 [0,-1,0,-57333,4967537] 1 [-157:3174:1]&[167:150:1]
121900j (1 curve)	0	2- 5- 23- 53+	2-  0 5- -1  6  4 -1 -4
Curve Equation t 121900j1 [0,0,0,-64632625,199998103125] 1
121900k (2 curves)	0	2- 5- 23- 53+	2- -2 5-  5  3  5  0 -7
Curve Equation t 121900k1 [0,1,0,-419708,104479588] 3 121900k2 [0,1,0,-1224708,-393010412] 1

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