Updating from BO 4.1 SP4 TO SP6

Hi All

We have sap bo 4.1 sp4 platform and wanted to update to 4.1 sp6

My question is do we have to update from sp4 to sp5 then to sp6 or we can update direct to sp6

What will be the exact patch name for sp5 or sp6 to download .

Thanks

James