How to understand what encryption algorithm the given text is encrypted with?

Question

Encryption

I need help deciphering this text, and I would like to understand what encryption method was used, the encryption algorithm did not use the key:

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

Answer 1

Looks like base64 is applied twice. And then it looks like a word in which Russian characters are encoded by their serial numbers (too lazy to decode completely).
PS Already answered in the comments, it turns out

Answer 2

base64