76 * Arithmetic on the twisted Edwards curve -x^2 + y^2 = 1 + dx^2y^2
77 * with d = -(121665/121666) = 37095705934669439343138083508754565189542113879843219016388785533085940283555
78 * Base point: (15112221349535400772501151409588531511454012693041857206046113283949847762202,46316835694926478169428394003475163141307993866256225615783033603165251855960);