The term improper fraction is identified in base64 scheme by the sequence aW1wcm9wZXIgZnJhY3Rpb24=, while the MD5 signature is equal to a4b9270d3c17a954c7d679a71757ac93. The ASCII encoding of improper fraction in hexadecimal notation is 696d70726f706572206672616374696f6e.