The term mainframe computer is identified in base64 scheme by the sequence bWFpbmZyYW1lIGNvbXB1dGVy, while the MD5 signature is equal to be86eddf9bdb443129cdaba317935cc7. The ASCII encoding of mainframe computer in hexadecimal notation is 6d61696e6672616d6520636f6d7075746572.