YIMO II recap: 2,633 competitors from 100 countries

The second Youth International Math Olympiad ran online August 29–30, 2026, with 2,633 competitors from 100 countries and $1,600 in prize money awarded.

YIMO II, the second Youth International Math Olympiad, ran online on August 29 and 30, 2026. It drew 2,633 competitors from 100 countries, up from 303 competitors across 53 countries for YIMO I.

The format

YIMO II kept individual and team rounds, with divisions structured for middle and high school students. The competition ran online, so students could take part through a browser from anywhere.

By the numbers

2,633 competitors. 100 countries. $1,600 in prize money awarded to winners. Compared with YIMO I's 303 competitors from 53 countries and $1,100 in prizes, the second edition drew almost nine times as many registrations.

Thank you to our sponsors

YIMO II was backed by Hudson River Trading, with support from Art of Problem Solving (AoPS) and PiMath (the Paquin Institute of Mathematics). Their backing is what lets YIMO stay free to enter while still awarding real prizes to winners around the world.

And thank you to every student who showed up for two days of hard problems. See you at the next one.