30 lines
588 B
Factor
30 lines
588 B
Factor
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! 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 math.miller-rabin ;
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IN: project-euler.007
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! http://projecteuler.net/index.php?section=problems&id=7
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! DESCRIPTION
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! -----------
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! By listing the first six prime numbers: 2, 3, 5, 7, 11, and 13, we can see
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! that the 6th prime is 13.
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! What is the 10001st prime number?
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! SOLUTION
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! --------
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: nth-prime ( n -- n )
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2 swap 1- [ next-prime ] times ;
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: euler007 ( -- answer )
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10001 nth-prime ;
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! [ euler007 ] time
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! 19230 ms run / 487 ms GC time
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MAIN: euler007
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