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CRC polynominals have always the highest degree (bit) set.
The full CRC32 polynominal you've posted is x^32 + x^26 + x^23 + x^22 + ...
The x^32 part sometimes gets ommited, since you would need 33 bits to represent that number.
Since you don't do an integer division but rather a polynominal division this is no problem.
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