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Curve Isogeny class
LMFDB label Cremona label LMFDB label Cremona label Weierstrass coefficients Rank Torsion structure
221.a1 221a2 221.a 221a $[1, -1, 1, -11718, 491144]$ $0$ $[2]$
221.a2 221a1 221.a 221a $[1, -1, 1, -733, 7804]$ $0$ $[2]$
221.b1 221b1 221.b 221b $[1, 1, 0, -59, 152]$ $0$ $[2]$
221.b2 221b2 221.b 221b $[1, 1, 0, -54, 185]$ $0$ $[2]$
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