How many fields are there (Up to isomorphism) with exactly 6 elements?

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How many fields are there (Up to isomorphism) with exactly 6 elements? In case of Group of order 6.. number of group( up to isomorphism )is 2..but what is it in case of field?

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The order of a finite field must be a power of a prime, so there are no fields with $6=2\times3$ elements.