Specialization t = -169/16 of a generic rank-4 Mordell family obtained from the Burkhardt quartic, with affine parameters (a,b,c,d) = (-10,-32,-9,-4) and generating parameters (u,v,w) = (3,-2,-6).
Found using a sixth-power-residue Mestre–Nagao sieve across Burkhardt surface parameters, with 3-isogeny deduplication and conductor-aware candidate selection.
PARI/GP 2.17.4 establishes exact rank 11, with bounds [11,11] and 11 independent rational points.
Commentary
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