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Commentary history

1 edit.

• David Renshaw · 2026-09-26 20:51:35 UTC

  Cremona 840f1 = LMFDB 840.d4: https://www.lmfdb.org/EllipticCurve/Q/840/d/4 Mordell–Weil rank exactly 1 (Cremona's tables). Conductor 840, minimal discriminant 8400, torsion ℤ/4ℤ. The witness is the generator from Cremona's tables.