Q:

Write a method that calculates the largest prime factor of a given number

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mahmoud2506
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2022-04-28
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The prime factors of 455 are 5, 7 and 13.
Write a method that calculates the largest prime factor of a given number.

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mahmoud2506
2022-04-28
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public Integer largestPrimeFactor(Integer n) {
int factor = -1;
for (int i = 2; i * i <= n; i++) {
    if (n == 1) { break; }
    if (n % i != 0) { continue; }
    factor = i;
    while (n % i == 0) {
        n /= i;
    }
}
return n == 1 ? factor : n;
}

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