Respuesta :

konrad509

[tex]3999991=4000000-9=2,000^2-3^2=(2000-3)(2000+3)=1997\cdot2003[/tex]

As we can see, the number 3999991 can be expressed as a product of two numbers that are not 1 and the number 3999991 itself, therefore that number is not prime.

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