Cremona's table of elliptic curves

21660 = 2² · 3 · 5 · 19²

Class	r	Atkin-Lehner	Eigenvalues
21660a (1 curve)	0	2- 3+ 5+ 19+	2- 3+ 5+  2  3 -6  2 19+
Curve Equation t 21660a1 [0,-1,0,-50793181,-139314733175] 1
21660b (2 curves)	2	2- 3+ 5+ 19+	2- 3+ 5+ -2 -6  2 -2 19+
Curve Equation t Generators 21660b1 [0,-1,0,-101,-354] 2 [-5:1:1]&[19:65:1] 21660b2 [0,-1,0,-196,520] 2 [-14:18:1]&[-6:38:1]
21660c (1 curve)	0	2- 3+ 5+ 19+	2- 3+ 5+ -3 -2 -1  2 19+
Curve Equation t 21660c1 [0,-1,0,-1877681,991029006] 1
21660d (1 curve)	0	2- 3+ 5+ 19+	2- 3+ 5+  4 -2  6 -5 19+
Curve Equation t 21660d1 [0,-1,0,-2286,-486735] 1
21660e (4 curves)	1	2- 3+ 5+ 19-	2- 3+ 5+  2  0  4  6 19-
Curve Equation t Generators 21660e1 [0,-1,0,-440901,-112526334] 2 [-147529240040:37949084237:385828352] 21660e2 [0,-1,0,-475196,-93965880] 2 [-94493:1370356:343] 21660e3 [0,-1,0,-960741,198195030] 2 [2141:89167:1] 21660e4 [0,-1,0,-13341236,18754080936] 2 [-1070:178334:1]
21660f (1 curve)	1	2- 3+ 5+ 19-	2- 3+ 5+  2 -1 -6 -2 19-
Curve Equation t Generators 21660f1 [0,-1,0,-7993021,-8695229495] 1 [3691:109878:1]
21660g (2 curves)	1	2- 3+ 5+ 19-	2- 3+ 5+  2 -6  4  3 19-
Curve Equation t Generators 21660g1 [0,-1,0,-6,45] 1 [-1:7:1] 21660g2 [0,-1,0,-1146,15321] 1 [20:1:1]
21660h (2 curves)	1	2- 3+ 5+ 19-	2- 3+ 5+ -2  0  4 -2 19-
Curve Equation t Generators 21660h1 [0,-1,0,-7701,200970] 2 [-390:5415:8] 21660h2 [0,-1,0,-41996,-3132504] 2 [361:5350:1]
21660i (2 curves)	1	2- 3+ 5+ 19-	2- 3+ 5+ -4  2 -6 -2 19-
Curve Equation t Generators 21660i1 [0,-1,0,6739,40686] 2 [13:361:1] 21660i2 [0,-1,0,-27556,356200] 2 [-6:722:1]
21660j (1 curve)	1	2- 3+ 5+ 19-	2- 3+ 5+ -5  6  1 -2 19-
Curve Equation t Generators 21660j1 [0,-1,0,4079,145870] 1 [1778:75000:1]
21660k (1 curve)	1	2- 3+ 5- 19+	2- 3+ 5-  1 -6  3  2 19+
Curve Equation t Generators 21660k1 [0,-1,0,-9145,-5871050] 1 [10710:1108270:1]
21660l (1 curve)	1	2- 3+ 5- 19+	2- 3+ 5- -2 -2  0  1 19+
Curve Equation t Generators 21660l1 [0,-1,0,3317470,44195123097] 1 [1324:225625:1]
21660m (1 curve)	1	2- 3+ 5- 19+	2- 3+ 5- -2  3  0 -4 19+
Curve Equation t Generators 21660m1 [0,-1,0,-1925,33105] 1 [32:57:1]
21660n (2 curves)	1	2- 3+ 5- 19+	2- 3+ 5- -4  0  4 -2 19+
Curve Equation t Generators 21660n1 [0,-1,0,355,2382] 2 [-1:45:1] 21660n2 [0,-1,0,-2020,24232] 2 [-6:190:1]
21660o (1 curve)	0	2- 3+ 5- 19-	2- 3+ 5- -1  2 -3  6 19-
Curve Equation t 21660o1 [0,-1,0,-25,-50] 1
21660p (1 curve)	2	2- 3+ 5- 19-	2- 3+ 5- -2 -1 -4 -8 19-
Curve Equation t Generators 21660p1 [0,-1,0,-405,2097] 1 [-21:30:1]&[-8:69:1]
21660q (1 curve)	0	2- 3+ 5- 19-	2- 3+ 5-  4  2  2  1 19-
Curve Equation t 21660q1 [0,-1,0,1259770,1230017865] 1
21660r (1 curve)	1	2- 3- 5+ 19+	2- 3- 5+  2 -1  6 -2 19+
Curve Equation t Generators 21660r1 [0,1,0,-22141,1260719] 1 [82:57:1]
21660s (2 curves)	1	2- 3- 5+ 19+	2- 3- 5+  2 -6 -4  3 19+
Curve Equation t Generators 21660s1 [0,1,0,-2286,-295191] 3 [2670:137967:1] 21660s2 [0,1,0,-413826,-102604035] 1 [207497418925:10451068267731:76765625]
21660t (2 curves)	1	2- 3- 5+ 19+	2- 3- 5+ -2 -6 -2 -2 19+
Curve Equation t Generators 21660t1 [0,1,0,-36581,2647320] 2 [321001536:11107838481:262144] 21660t2 [0,1,0,-70876,-3141676] 2 [4879:340320:1]
21660u (1 curve)	1	2- 3- 5+ 19+	2- 3- 5+ -5  6 -1 -2 19+
Curve Equation t Generators 21660u1 [0,1,0,1472399,-1009356976] 1 [599:9375:1]
21660v (1 curve)	0	2- 3- 5+ 19-	2- 3- 5+  2  3  6  2 19-
Curve Equation t 21660v1 [0,1,0,-140701,20266799] 1
21660w (2 curves)	0	2- 3- 5+ 19-	2- 3- 5+ -2  4  0 -2 19-
Curve Equation t 21660w1 [0,1,0,-1220661,-519488640] 2 21660w2 [0,1,0,-1254956,-488787756] 2
21660x (1 curve)	0	2- 3- 5+ 19-	2- 3- 5+ -3 -2  1  2 19-
Curve Equation t 21660x1 [0,1,0,-677842961,-6793400894640] 1
21660y (1 curve)	0	2- 3- 5+ 19-	2- 3- 5+  4 -2 -6 -5 19-
Curve Equation t 21660y1 [0,1,0,-6,69] 1
21660z (1 curve)	0	2- 3- 5- 19+	2- 3- 5- -1  2  3  6 19+
Curve Equation t 21660z1 [0,1,0,-9145,397568] 1
21660ba (1 curve)	0	2- 3- 5- 19+	2- 3- 5- -2 -1  4 -8 19+
Curve Equation t 21660ba1 [0,1,0,-146325,-13505625] 1
21660bb (1 curve)	0	2- 3- 5- 19+	2- 3- 5-  4  2 -2  1 19+
Curve Equation t 21660bb1 [0,1,0,3490,-178227] 1
21660bc (2 curves)	0	2- 3- 5- 19+	2- 3- 5- -4  0 -4 -2 19+
Curve Equation t 21660bc1 [0,1,0,128035,-17106600] 2 21660bc2 [0,1,0,-729340,-161831500] 2
21660bd (1 curve)	1	2- 3- 5- 19-	2- 3- 5-  1 -6 -3  2 19-
Curve Equation t Generators 21660bd1 [0,1,0,-25,848] 1 [11:-45:1]
21660be (1 curve)	1	2- 3- 5- 19-	2- 3- 5- -2 -2  0  1 19-
Curve Equation t Generators 21660be1 [0,1,0,9190,-6440475] 1 [205:2025:1]
21660bf (1 curve)	1	2- 3- 5- 19-	2- 3- 5- -2  3  0 -4 19-
Curve Equation t Generators 21660bf1 [0,1,0,-695045,-222897177] 1 [-12669:10286:27]

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