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number properties

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Source: — Problem Solving |
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by praveen_gmat » Fri Jan 27, 2012 12:28 am
Why do you need this?
Any way, the prime numbers up to 40 are:
1,3,5,11,13,17,19,23,29,31,37

The pairs are {23,17}, {29,11} and {37,3}.

And by the way, there are no negative primes.
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