25 52 97 | The death of Jeff Hanneman of Slayer, May 2, 2013

Jeff Hanneman died May 2, a date that can be written 2/5 or 5/2.

Notice his name sums to 52 and 97.  97, the 25th prime; Death = 97 / 25 / 52

He died 91-days after his birthday.  91, the 13th triangular (Dead in 2013)