Got it working. I downloaded two packages, primes and Numbers. Since Numbers has the three functions I want to use, primes, isPrime and isProbablyPrime, how do I uninstall the primes package so there won't be a conflict? Michael ================= [michael@localhost hackage.haskell.org]$ ghc-pkg hide primes Writing new package config file... done. [michael@localhost hackage.haskell.org]$ isPrime 7 bash: isPrime: command not found [michael@localhost hackage.haskell.org]$ ghci GHCi, version 6.10.1: http://www.haskell.org/ghc/  :? for help Loading package ghc-prim ... linking ... done. Loading package integer ... linking ... done. Loading package base ... linking ... done. Prelude> :m + Data.Numbers.Primes Prelude Data.Numbers.Primes> isPrime 7 Loading package syb ... linking ... done. Loading package base-3.0.3.0 ... linking ... done. Loading package old-locale-1.0.0.1 ... linking ... done. Loading package old-time-1.0.0.1 ... linking ... done. Loading package random-1.0.0.1 ... linking ... done. Loading package Numbers-0.2.1 ... linking ... done. True Prelude Data.Numbers.Primes> take 10 primes [2,3,5,7,11,13,17,19,23,29] Prelude Data.Numbers.Primes> --- On Wed, 6/3/09, michael rice wrote: From: michael rice Subject: Re: [Haskell-cafe] Cabal/primes To: "brian" Cc: haskell-cafe@haskell.org Date: Wednesday, June 3, 2009, 3:46 PM This is working differently than it did last night, when at least import was working. Michael [michael@localhost ~]$ ghci GHCi, version 6.10.1: http://www.haskell.org/ghc/  :? for help Loading package ghc-prim ... linking ... done. Loading package integer ... linking ... done. Loading package base ... linking ... done. Prelude> import Data.Numbers.Primes Could not find module `Data.Numbers.Primes':   it was found in multiple packages: Numbers-0.2.1 primes-0.1.1 Prelude> :m + Data.Numbers.Primes Could not find module `Data.Numbers.Primes':   it was found in multiple packages: Numbers-0.2.1 primes-0.1.1 Prelude> Data.Numbers.Primes> :browse <interactive>:1:21: parse error on input `:' Prelude> isPrime 3525266 <interactive>:1:0: Not in scope: `isPrime' Prelude> ========== [michael@localhost ~]$ cd .cabal [michael@localhost .cabal]$ ls -l total 20 -rw-rw-r-- 1 michael michael 1729 2009-06-02 18:59 config drwxrwxr-x 4 michael michael 4096 2009-06-02 22:14 lib drwxrwxr-x 2 michael michael 4096 2009-06-02 19:05 logs drwxrwxr-x 3 michael michael 4096 2009-06-02 18:59 packages drwxrwxr-x 3 michael michael 4096 2009-06-02 19:05 share [michael@localhost .cabal]$ cd packages [michael@localhost packages]$ ls -l total 4 drwxrwxr-x 4 michael michael 4096 2009-06-02 22:14 hackage.haskell.org [michael@localhost packages]$ cd hackage.haskell.org [michael@localhost hackage.haskell.org]$ ls -l total 12464 -rw------- 1 michael michael 11735040 2009-06-02 22:14 00-index.tar -rw------- 1 michael michael   992994 2009-06-02 22:14 00-index.tar.gz -rw-rw-r-- 1 michael michael      418 2009-06-02 22:14 build-reports.log drwxrwxr-x 3 michael michael     4096 2009-06-02 22:14 Numbers drwxrwxr-x 3 michael michael     4096 2009-06-02 19:05 primes [michael@localhost hackage.haskell.org]$ [michael@localhost hackage.haskell.org]$ pwd /home/michael/.cabal/packages/hackage.haskell.org [michael@localhost hackage.haskell.org]$ ============= --- On Wed, 6/3/09, brian wrote: From: brian Subject: Re: [Haskell-cafe] Cabal/primes To: "michael rice" Cc: haskell-cafe@haskell.org Date: Wednesday, June 3, 2009, 10:46 AM Prelude> :m + Data.Numbers.Primes Prelude Data.Numbers.Primes> :browse isPrime :: Integer -> Bool isProbablyPrime ::   (System.Random.RandomGen g) => Integer -> g -> (Bool, g) primes :: [Integer] Prelude Data.Numbers.Primes> isPrime 3525266 Loading package syb ... linking ... done. Loading package base-3.0.3.0 ... linking ... done. Loading package old-locale-1.0.0.1 ... linking ... done. Loading package old-time-1.0.0.1 ... linking ... done. Loading package random-1.0.0.1 ... linking ... done. Loading package Numbers-0.2.1 ... linking ... done. False Prelude Data.Numbers.Primes> On Jun 3, 2009, at 6:57 AM, michael rice wrote:

OK, I downloaded Numbers. Still missing the three functions I wanted, which are primes, isPrime, and isProbablyPrime. How do I get these?

Michael

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