29 lines
620 B
Factor
29 lines
620 B
Factor
! Copyright (c) 2007 Aaron Schaefer.
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! See http://factorcode.org/license.txt for BSD license.
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USING: kernel math project-euler.common sequences ;
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IN: project-euler.003
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! http://projecteuler.net/index.php?section=problems&id=3
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! DESCRIPTION
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! -----------
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! The prime factors of 13195 are 5, 7, 13 and 29.
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! What is the largest prime factor of the number 317584931803?
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! SOLUTION
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! --------
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: largest-prime-factor ( n -- factor )
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prime-factors supremum ;
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: euler003 ( -- answer )
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317584931803 largest-prime-factor ;
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! [ euler003 ] 100 ave-time
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! 404 ms run / 9 ms GC ave time - 100 trials
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MAIN: euler003
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