 
            
            
            
            
                16 Jan
                
                    2015
                
            
            
                16 Jan
                
                '15
                
            
            
            
        
    
                7:25 p.m.
            
        include/boost/multiprecision/cpp_int/misc.hpp uses boost::math::gcd (and lcm), but does not include common_factor_rt.hpp.