1 ! Copyright (c) 2007 Aaron Schaefer.
2 ! See https://factorcode.org/license.txt for BSD license.
3 USING: math.primes.factors sequences project-euler.common ;
6 ! https://projecteuler.net/problem=3
11 ! The prime factors of 13195 are 5, 7, 13 and 29.
13 ! What is the largest prime factor of the number 600851475143 ?
19 : euler003 ( -- answer )
20 600851475143 factors maximum ;
22 ! [ euler003 ] 100 ave-time
23 ! 1 ms ave run time - 0.49 SD (100 trials)