k1 ^= (long) toUnsignedInt(bb.get(6)) << 48; // fall through
        case 6:
          k1 ^= (long) toUnsignedInt(bb.get(5)) << 40; // fall through
        case 5:
          k1 ^= (long) toUnsignedInt(bb.get(4)) << 32; // fall through
        case 4:
          k1 ^= (long) toUnsignedInt(bb.get(3)) << 24; // fall through
        case 3:
          k1 ^= (long) toUnsignedInt(bb.get(2)) << 16; // fall through
        case 2:

              | (1L << (23 - 2))
              | (1L << (29 - 2))
              | (1L << (31 - 2))
              | (1L << (37 - 2))
              | (1L << (41 - 2))
              | (1L << (43 - 2))
              | (1L << (47 - 2))
              | (1L << (53 - 2))
              | (1L << (59 - 2))
              | (1L << (61 - 2));
      // Look up n within the mask.