Proof-of-work challenge

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You must complete this proof-of-work challenge before you can access this site.

Find an nonce that, when appended to the following data (after base64 decoding it), results in a SHA-256 hash that begins with at least 20 zero bits.

pW2w3N2iP/oO+S3kFh8mLvIF4rPIFMzBxQJ/And9S4M=

Please note that if your submission is successful, you will be given a cookie that will allow you to access this site for a period of time without having to complete the challenge again. By pressing the submit button, you agree to be given cookies for this purpose.

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Several offline challenge solvers are available in C, Go, and Python.