I tried but i have nothing maybe its mining ?
If it's really your own private key, you should try to remember what exactly you did back then.
i need to put private key it in bitcoin core ? or Electrum ?
Google tells me Electrum was released november 2011. You do the math whether or not it's possible.
If it did not work while converting it to WIF using bitaddress, that means it is not a valid private key.
I've tried a few, and it looks like any 64 character hex number is accepted. The address (probably uncompressed) may be empty though.