Cremona's table of elliptic curves

28272 = 2⁴ · 3 · 19 · 31

Class	r	Atkin-Lehner	Eigenvalues
28272a (2 curves)	1	2+ 3+ 19- 31-	2+ 3+  2  0 -2 -2  0 19-
Curve Equation t Generators 28272a1 [0,-1,0,-70867,7284970] 2 [-118:23085:8] 28272a2 [0,-1,0,-70732,7313968] 2 [168:380:1]
28272b (2 curves)	0	2+ 3- 19+ 31+	2+ 3-  2  0  6  6  0 19+
Curve Equation t 28272b1 [0,1,0,533,-2212] 2 28272b2 [0,1,0,-2412,-21060] 2
28272c (2 curves)	1	2+ 3- 19+ 31-	2+ 3-  2 -4  6  4 -2 19+
Curve Equation t Generators 28272c1 [0,1,0,68,140] 2 [23:120:1] 28272c2 [0,1,0,-312,900] 2 [0:30:1]
28272d (4 curves)	1	2+ 3- 19- 31+	2+ 3- -2  0 -4  2 -2 19-
Curve Equation t Generators 28272d1 [0,1,0,-199,1016] 2 [-4:42:1] 28272d2 [0,1,0,-244,476] 4 [-38:315:8] 28272d3 [0,1,0,896,4580] 2 [6270:51065:216] 28272d4 [0,1,0,-2104,-37468] 2 [142:1596:1]
28272e (2 curves)	1	2- 3+ 19+ 31-	2- 3+  2  0 -2  6  6 19+
Curve Equation t Generators 28272e1 [0,-1,0,-816717,-294004872] 2 [1712845932388483010597177410713089199510349037416:-35604354898489900492196346934602725652975942919945:1355551557038281068056270325803378202868500992] 28272e2 [0,-1,0,-13197212,-18448762740] 2 [-136528208825969414943256252:-6930792524817038743668845:65055937055658602679872]
28272f (2 curves)	1	2- 3+ 19- 31+	2- 3+  2 -4 -4  4 -6 19-
Curve Equation t Generators 28272f1 [0,-1,0,-37,-68] 2 [-156:85:64] 28272f2 [0,-1,0,-132,540] 2 [-3:30:1]
28272g (2 curves)	0	2- 3- 19+ 31-	2- 3- -2 -4  4  2  0 19+
Curve Equation t 28272g1 [0,1,0,-3649,-92470] 2 28272g2 [0,1,0,-59604,-5620824] 2
28272h (1 curve)	2	2- 3- 19- 31+	2- 3- -1 -5 -3 -6  7 19-
Curve Equation t Generators 28272h1 [0,1,0,-1101,22311] 1 [27:114:1]&[-13:186:1]
28272i (2 curves)	0	2- 3- 19- 31+	2- 3-  2  4  0  0 -2 19-
Curve Equation t 28272i1 [0,1,0,-4797,55242] 2 28272i2 [0,1,0,-39092,-2949000] 2
28272j (2 curves)	0	2- 3- 19- 31+	2- 3-  2  4  6  0 -2 19-
Curve Equation t 28272j1 [0,1,0,-146232,21520980] 2 28272j2 [0,1,0,-2341112,1377956820] 2
28272k (2 curves)	0	2- 3- 19- 31+	2- 3-  2 -4  2  4  6 19-
Curve Equation t 28272k1 [0,1,0,1048,-562380] 2 28272k2 [0,1,0,-96232,-11263180] 2
28272l (1 curve)	1	2- 3- 19- 31-	2- 3- -1  3  1  2  3 19-
Curve Equation t Generators 28272l1 [0,1,0,-87101,-73570809] 1 [535:5766:1]

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