Bitcoin lost ?

[fly31]

I bought 0.1 Bitcoin in 2013 and forgot it for a while. Now I see the value growing non stop and I'd like to update it in a current wallet 
The problem is... I didn't really saved it seriously.
- The wallet was installed on a phone I don't own anymore and a laptop I formated since
- I don't remember the software I used to keep the wallet
I copied a file on a USB key to save it. There is a text file on it, with 2 strings, but I don't remember what it is supposed to be and how to use it.
- The first is 75 char, the second is 52char
- The 52 char string start with a "G" (I seen that compressed private key of 52 char are supposed to start with K or L)
- There is "+"s and "/"s in both, so I guess it is base 64
- If it is password protected I suppose I know it
Is there a way to get it back or I lost it definitely 

[drwhobox]

Do you know what is the name of the wallet you used back in 2013? I think you may fille a case with them ( when it's a companey) but, most likely you cannot recover funds from a lost wallet in the system unless you do know the private key. If you can still find the private key on some of your storage compartments nor socialmedia's you can always put your private keys on bitcoin's official wallet. or just use the blockchain's website and input your adress's private key on it

[gentlemand]

https://www.bitaddress.org/

Download that to a very offline computer. Click on the 'wallet details' section. Feed the strings you have into the private key box and see if an address pops up. You can then check that address on a block explorer for a balance.

If it's a valid private key you can sweep it into many different wallets.

[fly31]

I tried https://www.bitaddress.org/ but it returns "The text you entered is not a valid private key"
It is normal because both string doesn't fit the different format that are suggested for a private key.
I guess it is actually the private key, but encrypted I don't know how !
Maybe having the name of the wallet software I used could help, but I really don't remember which one I used. Is there a list somewhere of the 2013 wallets so I can find the one I probably used ? I guess I took the most popular at this time...

[gentlemand]

There weren't masses around back then. Off the top of my head the most common ones apart from qt are electrum, armoury, multi bit and block chain. Info but that  would've given you a fiLe instead.

You could always try dave and wallet recovery services if you're truly stumped.

[fly31]

I managed to get it back. It was indeed in an old wallet software. Thanks for your help