The term arithmetic progression is identified in base64 scheme by the sequence YXJpdGhtZXRpYyBwcm9ncmVzc2lvbg==, while the MD5 signature is equal to 4a2d34bb7155ac3488483dea1b209394. The ASCII encoding of arithmetic progression in hexadecimal notation is 61726974686d657469632070726f6772657373696f6e.