Specialization t = -975/928 of a generic rank-four Mordell family derived from the Burkhardt parametrization with construction parameters (-9, 8, -2).
The specialization was identified in a coordinated multi-family search using a 328-prime Mestre–Nagao sieve.
PARI/GP 2.17.4 returned matching computational rank bounds [10,10].
jesper-petersen ·