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Curve Isogeny class
LMFDB label Cremona label LMFDB label Cremona label Weierstrass coefficients Rank Torsion structure
256.a1 256a2 256.a 256a $[0, 1, 0, -13, -21]$ $1$ $[2]$
256.a2 256a1 256.a 256a $[0, 1, 0, -3, 1]$ $1$ $[2]$
256.b1 256b1 256.b 256b $[0, 0, 0, -2, 0]$ $1$ $[2]$
256.b2 256b2 256.b 256b $[0, 0, 0, 8, 0]$ $1$ $[2]$
256.c1 256c2 256.c 256c $[0, 0, 0, -8, 0]$ $0$ $[2]$
256.c2 256c1 256.c 256c $[0, 0, 0, 2, 0]$ $0$ $[2]$
256.d1 256d2 256.d 256d $[0, -1, 0, -13, 21]$ $0$ $[2]$
256.d2 256d1 256.d 256d $[0, -1, 0, -3, -1]$ $0$ $[2]$
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