How to decode?

[msi_g]

Hello all,

I am very new in hashcat. How can I decode hashes like 

Code:

Q7eM0euncHNyrhJPjN06lw==

? I suspected it was base64 but decoding in base64 gives me some garbage. After succsessfull decrypting it will give some  integer greater than zero. I am suspecting that this hash has link with integer 

Code:

8129439051009

.

I have already posted here but with no hope. LINK