Prove that 10,007 is the smallest prime greater than 10,000.
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Just trial and error: 10001 = 73 x 137 10002 = even 10003 = 7 x 1429 10004 = even 10005 = last digit is 5 10006 = even 10007 = prime (test by dividing through all primes up to 101)
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