I'm sorry to tell you that it's the prvKey
FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 which is out of range, invalid.
Sadly, no one can recover those 3.7 BTC that your "
friend" accumulated:
1FYMZEHnszCHKTBdFZ2DLrUuk3dGwYKQxhIf it's out of range, then how did you generate the public key and end up with this address?
Sorry @nc50lc but it does'nt matter it is "out of range".
It does. Any private key greater than 2^256 - 432420386565659656852420866394968145600 is invalid.
as you see two differents pubkey are valid for the same transactions.
Two things:
1. Posting some lines of code doesn't strengthen the argument, especially when you don't describe what it does.
2. That doesn't have to do with a key being out of range.