The term exponential series is identified in base64 scheme by the sequence ZXhwb25lbnRpYWwgc2VyaWVz, while the MD5 signature is equal to e9cd152360bebfcb16723d1bb17c6339. The ASCII encoding of exponential series in hexadecimal notation is 6578706f6e656e7469616c20736572696573.