The string provided appears to be a in Wallet Import Format (WIF).
Are you trying to for this key, or is this part of a specific online puzzle or game? cDWFjmPB2JVi1wN4gciWAXjMeGrCjkaqlcquWEiAGIZ9Zzp...
Developers using dummy keys for testing software on the Bitcoin network. The string provided appears to be a in
Users attempting to recover an old wallet from a printed "paper wallet" or backup. cDWFjmPB2JVi1wN4gciWAXjMeGrCjkaqlcquWEiAGIZ9Zzp...