The Exercise Correction 2 natural integers numbers




1) 49 is not a prime number because may be divided by 7

we have the following numbers  2  ،  3  ،  5  ،  7  ،  11   ،  13  et 17 do not divide 239 and we have 17²>239>23²
then 239 is a prime number
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2) the decomposition into prime numbers : 

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