All children will have access to primary education only after 70 years, says UNESCO report.
Earlier world leaders promised that this goal can be achieved by 2015.
The report says that 57 million children currently out of school and primary education for children of poor African countries would only be possible in 2086.
The report's author, Rose Polin said that these were "shocking figures", reports BBC.
Lack of education and poor quality of schools in poor countries described as a "global crisis of education". In poor countries every fourth young person can not read a word.
The report is based on data from 2011. Though primary education of 57 million children waiting nearby, this is 50% less from 2000.