2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/62540We prove that there is no genus-2 curve over F_q whose Jacobian has characteristic polynomial of Frobenius equal to x^4 + (1 - 2q) x^2 + q^2. Maisner and Nart had observed (by direct computation) that this was true for all q less than 65.2 pages, Latex. To appear in Experiment. MathNumber TheoryAlgebraic Geometry11G20, 14G15 (Primary) 11G10, 14H25 (Secondary)text