This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 28 January 2020 | 
| Upload Date | 22 January 2020 | 
| File Name | iPad_64bit_TouchID_13.3.1_17D50_Restore.ipsw | 
| File Size | 3.39 GB | 
| SHA256sum | 18e1030ff76a40c98b501b91a19d5067eaffe2b85e93dc85342d8c3140d1e230 | 
| MD5sum | 5febfae0a5a1fa5c804a6552a53e6c0d | 
| SHA1sum | 4dd3263311b82380c5812d999184858ea3cc76e9 | 
| Identifier | iPad5,4 | 
cd ~/Downloads.idevicerestore -e iPad_64bit_TouchID_13.3.1_17D50_Restore.ipsw and press Enter.