Mordell curve y^2 = x^3 + -2122063497209716784937072. Source: N. D. Elkies, 'j=0, rank 15; also 3-rank 6 and 7 in real and imaginary quadratic fields', NMBRTHRY post, 30 Dec 2009, https://listserv.nodak.edu/cgi-bin/wa.exe?A2=NMBRTHRY;6a3fad67.0912&S=. Points are images of Elkies' points on y^2 = x^3 + 78594944341100621664336 under the 3-isogeny (x,y) -> ((x^3+4k)/x^2, y(x^3-8k)/x^3).
David Renshaw ·