Statistics Update (19 May 2026)

[euler]

We are very grateful for the understanding shown after sharing the difficult decision to remove the fastest solvers tables in their current form, and as promised, we will be working in the near future to consider a replacement.

The reason for the removal of the fastest solvers tables means that the Eulerians table, which shows the "successes" of recent solvers, has become equally polluted with cheats. As a result, they will be removed in the next day or so. The good news is that at the same time we will be introducing a new data packed table in the Statistics section that shows the ranks of the problem set over the past 28 days, as well as the lowest/highest ranks seen (with dates). The data has only been captured across all problems since 17 April, which marks the time when we made the final tweaks to the rating algorithm, but it already provides useful insights. In addition, below each problem you will be able to see a graph showing the movement of ranks over the past 28 days. The minimal API will also be updated to allow members to capture current snapshots of problem difficulty ranks (using minimal=problems).

Once again, thank you for your understanding, and we hope that this does not detract from the main reason we have such dedicated and engaged members: the problems. We hope that you will enjoy the upcoming problems, especially as we celebrate the publication of the landmark problem 1000 shortly.

[TitanCode]

This file
projecteuler.net/minimal=problems
will still contain the Solve Status when the update is done, right?
Right now it is missing (yes, I am logged in)

[euler]

I am currently doing a review and overhaul of the minimal API. At the moment, you can use minimal=solved to show which problems you have solved with dates.

[TitanCode]

The file projecteuler.net/minimal=problems
currently does not contain the solved status. Will it return in the future?

I use the file to compile my own PDF of unsolved problems. I rather have everything in one file, as the download cannot be automated (if it can, please tell me how).

[euler]

No, I removed it as I wanted to compartmentalise the problem data from progress data. Instead you can now use minimal=solved. This will list all the problems you have solved in chronological order, with dates (if available), which is far more useful.

I'm slowly overhauling some elements of the minimal API which is why it's not currently documented anywhere.