Elliptic Curve Rank Leaderboard

← curve #896

Commentary history

1 edit.

• David Renshaw · 2026-09-23 14:57:09 UTC

  Cremona 21a4 = LMFDB 21.a6: https://www.lmfdb.org/EllipticCurve/Q/21/a/6 Mordell–Weil rank exactly 0 (Cremona's tables). Conductor 21, minimal discriminant -63, torsion ℤ/4ℤ.