So I think, 1 2 3 5 6 would be the formula for the major pentatonic, right? So cutting out the 4th and 7th degree of the major scale. For the minor pentatonic, the notes are the same as in the pentatonic of the parent relative major (A minor pentatonic has the same notes as C major pentatonic, because A minor and C major are relative keys), so for the direct construction of the minor pentatonic (not using the relative major), we need to cut out the 2nd and 6th degree instead. So the formula for the minor pentatonic would be 1 b3 4 5 b7. Hope that made some sense.