@tpr Well, like in the wiki it says "He started playing chess when he was 7" and then "he got the title of a GM when he was 12". And then 12-7 = 5 that means he became a GM after 5 years.
Bu born 1985 start 1991 grandmaster 1999 = 8 years Karjakin born 1990 start 1995 grandmaster 2003 = 8 years Negi born 1993 start 1998 grandmaster 2006 = 8 years Carlsen born 1990 start 1995 grandmaster 2004 = 9 years Ponomariov born 1983 start 1988 grandmaster 1998 = 10 years