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2017-04-06 20:47:16

Largest prime factor
Problem 3
The prime factors of 13195 are 5, 7, 13 and 29.
What is the largest prime factor of the number 600851475143 ?

Answer
number = 600851475143

i = 2
m = 2
while number != 1:
    if number % i == 0:
        number = number / i
        m = i
    i = i + 1

print m