The term existential operator is identified in base64 scheme by the sequence ZXhpc3RlbnRpYWwgb3BlcmF0b3I=, while the MD5 signature is equal to abeb5b1eb015a2c55d2836474aec72b5. The ASCII encoding of existential operator in hexadecimal notation is 6578697374656e7469616c206f70657261746f72.