Mercurial > repos > other > SevenLanguagesInSevenWeeks

diff 7-Haskell/day2.hs @ 91:075ff4e4feaf

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Fix the prime checking Greatest common denominator MAY work, but it's probably inefficient (I also wondered whether it wouldn't always work, but then the number can't be a prime!)
author IBBoard <dev@ibboard.co.uk>
date Mon, 17 Jun 2019 20:26:30 +0100
parents c27c87cd0f08
children 6f650dd96685
line wrap: on
line diff
--- a/7-Haskell/day2.hs	Sun Jun 16 21:09:33 2019 +0100
+++ b/7-Haskell/day2.hs	Mon Jun 17 20:26:30 2019 +0100
@@ -54,4 +54,4 @@
     
     -- Wilson's theorem seems easiest: https://en.wikipedia.org/wiki/Wilson%27s_theorem
     primes :: [Integer]
-    primes = [x | x <- [2 ..], (gcd ((product [1 .. x-1]) + 1) x) == x]
\ No newline at end of file
+    primes = [x | x <- [2 ..], (mod ((product [1 .. x-1]) + 1) x) == 0]
\ No newline at end of file