# \#challenge **URL:** https://forum.elixirforum.com/tag/challenge/1087.md [Latest](https://forum.elixirforum.com/latest.md) · [Categories](https://forum.elixirforum.com/categories.md) · [Tags](https://forum.elixirforum.com/tags.md) --- ## [Composite Learning: \>$1.5M per Team for Breakthroughs in Decentralized Training](https://forum.elixirforum.com/t/composite-learning-1-5m-per-team-for-breakthroughs-in-decentralized-training/67718)
**Author:** [@preciz](https://forum.elixirforum.com/u/preciz)\ **Replies:** 0\ **Last updated:** [November 27, 2024, 2:13pm UTC](https://forum.elixirforum.com/t/composite-learning-1-5m-per-team-for-breakthroughs-in-decentralized-training/67718 "2024-11-27T14:13:14Z")
Somebody sent me this today: I wonder if this is relevant for the Nx ecosystem since if I remember correctly currently some people in the ecosystem plan to tackle similar challenges. --- ## [What were the most challenging tasks you faced and how did you solve them in Elixir?](https://forum.elixirforum.com/t/what-were-the-most-challenging-tasks-you-faced-and-how-did-you-solve-them-in-elixir/52777)
**Author:** [@Alia](https://forum.elixirforum.com/u/Alia)\ **Replies:** 18\ **Last updated:** [January 13, 2023, 11:46am UTC](https://forum.elixirforum.com/t/what-were-the-most-challenging-tasks-you-faced-and-how-did-you-solve-them-in-elixir/52777 "2023-01-13T11:46:18Z")
Greetings Everyone! Let’s discuss the challenges that we are facing in Elixir from start. Everyone can share his/her story according to their own. I love to hear your stories. :innocent: Our topic is what are the most … --- ## [Optimization challenge: bcrypt in pure Elixir](https://forum.elixirforum.com/t/optimization-challenge-bcrypt-in-pure-elixir/47547)
**Author:** [@Nicd](https://forum.elixirforum.com/u/Nicd)\ **Replies:** 2\ **Last updated:** [May 27, 2022, 1:16pm UTC](https://forum.elixirforum.com/t/optimization-challenge-bcrypt-in-pure-elixir/47547 "2022-05-27T13:16:13Z")
So I’ve been working on a pure Elixir version of bcrypt for mostly fun and to learn how it works. Currently I have the expensive part (the key setup) running, but I’m missing the call to Blowfish and checking that it act… --- ## [Roman number conversion challenge question](https://forum.elixirforum.com/t/roman-number-conversion-challenge-question/37192)
**Author:** [@PeterCcT](https://forum.elixirforum.com/u/PeterCcT)\ **Replies:** 4\ **Last updated:** [February 1, 2021, 12:55am UTC](https://forum.elixirforum.com/t/roman-number-conversion-challenge-question/37192 "2021-02-01T00:55:12Z")
Hi guys! I’m super new to Elixir, and my English can be a little bad, so I’m sorry about that. Well, I’m here to get some advice on my code, it works well, but I don’t know if there’s anything I can do to make it more … --- ## [Gnome Community Engagement Challenge, Ideas and Discussion](https://forum.elixirforum.com/t/gnome-community-engagement-challenge-ideas-and-discussion/30557)
**Author:** [@LTheGreats](https://forum.elixirforum.com/u/LTheGreats)\ **Replies:** 0\ **Last updated:** [April 12, 2020, 7:59am UTC](https://forum.elixirforum.com/t/gnome-community-engagement-challenge-ideas-and-discussion/30557 "2020-04-12T07:59:18Z")
The Gnome Foundation recently announced the Community Engagement Challenge, in which people are supposed to come up with proposals for ways in which we can increase participation in open-source across the board and bring… --- ## [The similarity challenge](https://forum.elixirforum.com/t/the-similarity-challenge/16897)
**Author:** [@joeerl](https://forum.elixirforum.com/u/joeerl)\ **Replies:** 7\ **Last updated:** [September 30, 2018, 2:42pm UTC](https://forum.elixirforum.com/t/the-similarity-challenge/16897 "2018-09-30T14:42:35Z")
(Programming challenge #1) I’m often asked if I can think of any good problems to solve - well yes - here’s a problem I’ve been working on for years. It’s really difficult (and BTW it formed the subject of Chapter 27 (S…