id summary reporter owner description type status milestone component version severity resolution keywords cc 9233 Suboptimal shift by multiples of 8 bits Domagoj Šarić John Maddock It seems to me that the operation from the subject is needlessly fat, as if it is using a generic implementation for a generic/'random' number of bits... Bugs closed To Be Determined multiprecision Boost 1.54.0 Optimization wontfix