In reply to Stat_FEPS.

I suppose this question is releated to the question you posted on the SAS Support Communities. The Support Communites are the right place to get an answer. I haven't weighed in because you've never said what you intend to do with this number. Factor it? Divide by it? Unless you are a researcher in number theory, numbers of this size usually indicate that you should change to a log scale. Statisticians use quantities like log-likelihood and log-determinants because numerical computations that overflow on the original scale succeed on a log scale.