Copyright | Copyright (C) 2021 Yoo Chung |
---|---|

License | GPL-3.0-or-later |

Maintainer | dev@chungyc.org |

Safe Haskell | Safe-Inferred |

Language | GHC2021 |

Part of Ninety-Nine Haskell Problems. Some solutions are in Solutions.P40.

# Documentation

goldbach :: Integral a => a -> (a, a) Source #

Goldbach's conjecture says that every positive even number greater than 2 is the sum of two prime numbers. For example: \(28 = 5 + 23\). It is one of the most famous facts in number theory that has not been proved to be correct in the general case. It has been numerically confirmed up to very large numbers.

Write a function to find two prime numbers that sum up to a given even integer.

### Examples

`>>>`

(5,7)`goldbach 12`