Factoring large numbers is a difficult problem in general. The particular number you cite is small enough to be fairly easy. &Math::Pari::factor doesn't take much time to find that the prime factors of 133745531 are 467 and 286393. You may also have a system program called 'factor' which will give that result somewhat more slowly.

The difficulty of this problem is the basis of RSA public key cryptosystems.

After Compline,
Zaxo

In reply to Re: Solving math equations by Zaxo
in thread Solving math equations by FireBird34

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