The report commissioned by Rochdale Borough Safeguarding Children Board (RBSCB) added:
Given the highly organised, determined and manipulative behaviour of the perpetrators, it would be unrealistic to imagine that their behaviour could have been predicted and that all harm to all the young people they abused could have been prevented.
However, had the sexual exploitation been recognised and responded to at the earliest stages, these young people may have been protected from repeat victimisation and other young people may also have been protected from becoming victims.
More top news
Office star Martin Freeman has given his backing to Labour in the party's first Party Election Broadcast in England.
Today's weather will remain unsettled, with some cold, wet and windy conditions.
A senior nurse who filmed himself raping unconscious patients at the John Radcliffe Hospital, Oxford has been convicted.