Developer`BitShiftLeft
BitShiftLeft[n, d] shifts the binary bits in the integer n to the left by d places, padding with zeros on the right.
BitShiftLeft[n, d] is equivalent to n 2^d. Negative values of d shift to the right.
BitShiftLeft[n, d] shifts the binary bits in the integer n to the left by d places, padding with zeros on the right. 
