diff --git a/examples/python/pell_equation_sat.py b/examples/python/pell_equation_sat.py
index cbd4797415..09d12c50c0 100644
--- a/examples/python/pell_equation_sat.py
+++ b/examples/python/pell_equation_sat.py
@@ -22,7 +22,7 @@ from ortools.sat.python import cp_model
 
 
 _COEFF = flags.DEFINE_integer("coeff", 1, "The Pell equation coefficient.")
-_MAX_VALUE = flags.DEFINE_integer("max_value", 500000000, "The maximum value.")
+_MAX_VALUE = flags.DEFINE_integer("max_value", 5000_000, "The maximum value.")
 
 
 def solve_pell(coeff: int, max_value: int):