n! has 13 zeros.the highest and least values of n?

• 55! , 56! , 57! , 58! and 59! have 13 zeros.
  
  N = number of zeros for n! = (n/5) + (n/5^2) + (n/5^3) + . . .
  where N = a natural number
  
  
  
• 12 years agoHelpfull: Yes(1) No(1)