Specialization at t = -789/521 of a generic rank-four Mordell family obtained from the Burkhardt parametrization with construction parameters (-6,-1,-9).
The specialization was identified by an optimized Mestre–Nagao sieve using 328 primes and examined using PARI/GP 2.17.4.
PARI/GP returned matching computational rank bounds [9,9].
jesper-petersen ·