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###
# 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 ?
###
const NUMBER = 600851475143
function factors(n)
factors = []
while n > 1
for d in 2:n
if n % d == 0
n = Int64(n / d)
push!(factors, d)
break
end
end
end
factors
end
println(maximum(factors(NUMBER)))
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