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Gerhard J. Woeginger maintains a list that , as of 2018 , contains 62 purported proofs of " P " = " NP " , 50 proofs of " P " " ≠ " " NP " , 2 proofs the problem is unprovable , and one proof that it is undecidable .
 Gerhard J. Woeginger
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Answer:
 Gerhard J. Woeginger