THIS IS JUST A JOKE!!!
The first edition day is March ninth and called The Miku's day in Japan (In Japanese, 39 can be read "miku").
M1=miku M2=dimiku M3=trimiku
and so on...
M39=MM1=mik-miku MM2=mik-di-miku MM3=mik-tri-miku
MMM1=mik-mik-miku MMMM1=mik-mik-mik-miku=second-tetramiku MMMMM1=second-pentamiku
This is just a tetration and nobody cares such a small notation. But I have more extensions:
M(39,39)=di-line-miku M(39,39,39)=tri-line-miku M(39,39,39,39)=tetra-line-miku M(39,39,39,39,39)=penta-line-miku
and so on.
I came up with much bigger notation later. I will write it in after Part 2.