For the algorithmic performance concept 'constant factor', see Big O notation.The Constant Factor (Polish: Constans) is a 1980 Polish film directed by Krzysztof Zanussi. It tells the story of a young man struggling to face the death of his mother and harbouring a desire to climb the Himalayas as his father had done.The film won the Jury Prize and the Prize of the Ecumenical Jury at the 1980 Cannes Film Festival.