By the end of the fifth week, there are 924 registered participants from 71 countries (the list of countries is given below). In total, 76 solutions were submitted, out of which 19 were correct.
For this problem, I have decided to consider a solution as deserving full marks even if the answer for 2MT-strong B-fields is incorrect, as long as the formula gives a correct answer for ca 10 times weaker fields. However, those of you who have a good answer for 2MT-strong B-fields, have better chances of getting the best solution award.
Correct solutions were submitted by:
| First Name | Surname | Country | School/University | date | time |
| Vlad-Ștefan | Oros | Romania | “Grigore Moisil” Informatics High School | 27/12/20 | 16:22:00 |
| Oliwier | Urbański | Poland | Liceum Ogólnokształcące nr 7 w Poznaniu | 27/12/20 | 18:05:00 |
| Zhening | Li | Canada | Sir John A. Macdonald Secondary School | 29/12/20 | 04:10:00 |
| Elio | Moreau | Italy | École Polytechnique Fédérale de Lausanne | 30/12/20 | 19:20:00 |
| Eddie | Chen | United States | West-Windsor Plainsboro High School North | 01/01/21 | 03:25:00 |
| Antonia | Ghita | Romania | International Computer High School of Bucharest | 03/01/21 | 11:49:00 |
| Joshua | Teo | Singapore | NUS High School | 04/01/21 | 05:40:00 |
| Nikita | Semenin | Russia | Moscow Institute of Physics and Technology | 08/01/21 | 19:40:00 |
| Yuechen | Zhu | China | Peking University | 11/01/21 | 05:47:00 |
| Batuhan | Keskin | Turkey | Boğazici University | 12/01/21 | 22:05:00 |
| Minh | Trang Dao | VietNam | Hus highschool for gifted students | 15/01/21 | 09:11:00 |
| Anastasia | Pozharkova | Russia | MBOU “Gymnasium 91 named after M. V. Lomonosov” | 16/01/21 | 07:27:00 |
| Tevž | Lotrič | Slovenia | University of Oxford | 16/01/21 | 21:51:00 |
| Caio Augusto | Siqueira da Silva | Brazil | Colégio Objetivo Integrado | 23/01/21 | 05:56:00 |
| Manh Quan | Nguyen | Vietnam | Hanoi – Amsterdam High School for the Gifted | 23/01/21 | 17:21:00 |
| Pieter | Van Steenweghen | Belgium | Imperial College London | 24/01/21 | 02:23:00 |
| Lotus | Chen | China | No.2 High School Shijiazhuang | 24/01/21 | 03:56:00 |
| Qian | Lin | China | University of Oxford | 24/01/21 | 19:55:00 |
| Balázs | Kovács | Hungary | Hatvani Bajza József Gimnázium | 29/01/21 | 19:34:00 |
Participating countries: Algeria, Azerbaijan, Australia, Bangladesh, Belarus, Belgium, Bosnia and Herzegovina, Bolivia, Brazil, Bulgaria, Cambodia, Canada, China, Croatia, Czechia, Egypt, El Salvador, Estonia, Finland, Georgia, Germany, Greece, Hungary, India, Indonesia, Iran, Israel, Italy, Japan, Kazakhstan, Kenya, Korea, Kyrgyzstan, Latvia, Lebanon, Lithuania, Macedonia, Malaysia, Mexico, Moldova, Mongolia, Nepal, Nigeria, North Macedonia, Pakistan, Peru, Philippines, Poland, Romania, Russia, Saudi Arabia, Serbia, Singapore, Slovakia, Slovenia, South Africa, South Korea, Spain, Sri Lanka, Sweden, Switzerland, Syria, Taiwan, Thailand, Turkey, Turkmenistan, United Arab Emirates, United Kingdom, United States, Uzbekistan, Vietnam.