This is LaTeX code:

[latex]
 
\
 M ( 3^{2136} - 1, 3^{2138} + 3^{2136}-2)=
\
 M ( 3^{2136}-1, 3^{2138}+3^{2136}-2-3^{2136}+1)=
\ 
 M ( 3^{2136}-1, 3^{2138}-1)=
\
 M ( 3^{2136}-1,3^{2138}-3^{2136})=
\
 M ( 3^{2136}-1, 8\cdot 3^{2136})=
\ 
 M ( 3^{2136}-1,8)=
\
 M ( 9^{1068}-1,8)=8
 
[/latex]