A non-trivial factor is a divisor of an integer that is neither 1 nor the integer itself. In the context of integer factorization, finding a non-trivial factor is essential because it indicates that the number can be factored into smaller components, revealing important properties about the integer and aiding in its decomposition. This concept becomes particularly relevant in methods like the elliptic curve method for integer factorization, where non-trivial factors are key to efficiently breaking down large numbers.
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