A number P>1 is prime iff:

A. P! ≡ -1 (mod p)
B. (P – 2)! ≡ 2 (mod p)
C. (P-1)! ≡ 0 (mod p)
D. (P-1)! ≡ -1 (mod p)
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D. (P-1)! ≡ -1 (mod p)

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