Cremona's table of elliptic curves

84987 = 3² · 7 · 19 · 71

Class	r	Atkin-Lehner	Eigenvalues
84987a (1 curve)	1	3+ 7- 19- 71+	1 3+  1 7-  5 -1  0 19-
Curve Equation t Generators 84987a1 [1,-1,0,741,-140068] 1 [152:1786:1]
84987b (2 curves)	1	3+ 7- 19- 71+	-1 3+  0 7-  2  6 -4 19-
Curve Equation t Generators 84987b1 [1,-1,1,-15965,266700] 2 [-58:1026:1] 84987b2 [1,-1,1,59650,2020968] 2 [798:-24007:1]
84987c (2 curves)	1	3+ 7- 19- 71+	-1 3+  2 7- -2 -2  4 19-
Curve Equation t Generators 84987c1 [1,-1,1,-4484,115750] 2 [35:10:1] 84987c2 [1,-1,1,-71579,7388848] 2 [5342:125575:8]
84987d (2 curves)	0	3+ 7- 19- 71-	1 3+  0 7- -2  6  4 19-
Curve Equation t 84987d1 [1,-1,0,-143682,-7057225] 2 84987d2 [1,-1,0,536853,-55102996] 2
84987e (2 curves)	0	3+ 7- 19- 71-	1 3+ -2 7-  2 -2 -4 19-
Curve Equation t 84987e1 [1,-1,0,-498,-4121] 2 84987e2 [1,-1,0,-7953,-271010] 2
84987f (1 curve)	2	3+ 7- 19- 71-	-1 3+ -1 7- -5 -1  0 19-
Curve Equation t Generators 84987f1 [1,-1,1,82,5160] 1 [-13:48:1]&[-6:69:1]
84987g (1 curve)	1	3- 7+ 19+ 71-	-1 3-  0 7+ -3  1 -6 19+
Curve Equation t Generators 84987g1 [1,-1,1,-284855,78822200] 1 [9400:905200:1]
84987h (1 curve)	1	3- 7+ 19+ 71-	-1 3-  3 7+  0 -2  0 19+
Curve Equation t Generators 84987h1 [1,-1,1,-26906,11733194] 1 [-144:3622:1]
84987i (4 curves)	0	3- 7+ 19- 71-	1 3- -2 7+  4  6 -2 19-
Curve Equation t 84987i1 [1,-1,0,-47808,-4011525] 2 84987i2 [1,-1,0,-47853,-4003560] 4 84987i3 [1,-1,0,-25488,-7774299] 2 84987i4 [1,-1,0,-70938,276399] 2
84987j (1 curve)	0	3- 7+ 19- 71-	-2 3-  4 7+  4  0 -5 19-
Curve Equation t 84987j1 [0,0,1,-3,126] 1
84987k (2 curves)	1	3- 7- 19+ 71+	-1 3-  2 7-  2  4  0 19+
Curve Equation t Generators 84987k1 [1,-1,1,481,1478] 2 [6:64:1] 84987k2 [1,-1,1,-2084,13790] 2 [-30:235:1]
84987l (1 curve)	0	3- 7- 19+ 71-	1 3-  2 7-  5 -3  6 19+
Curve Equation t 84987l1 [1,-1,0,-26136,-1619811] 1
84987m (1 curve)	1	3- 7- 19- 71-	1 3-  1 7- -1 -5  2 19-
Curve Equation t Generators 84987m1 [1,-1,0,-6084,184207] 1 [42:17:1]
84987n (1 curve)	1	3- 7- 19- 71-	1 3- -2 7-  5 -5  2 19-
Curve Equation t Generators 84987n1 [1,-1,0,46332,-64633091] 1 [1188:40223:1]
84987o (2 curves)	1	3- 7- 19- 71-	-1 3-  2 7- -2 -4  0 19-
Curve Equation t Generators 84987o1 [1,-1,1,-59684,-4869570] 2 [470:8175:1] 84987o2 [1,-1,1,96871,-26223672] 2 [11199:243587:27]

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