Urease enhances the rate of urea hydrolysis at pH 8, 20 degrees C, by a factor of 1E14. If a given quantity of urease hydrolyzes a given quantity of urea in 6.0 minutes at 20 degrees C and pH 8, how long (in years) would it take for the same amount of urea to be hydrolyzed under the same conditions in the absence of urease? Assume sterile conditions such that bacteria cannot affect the time.