Top participants
| Rank | Name | Recent average credit | Total credit | Amicable pairs discovered | Country | Participant since |
|---|---|---|---|---|---|---|
| 1961 | Xeno  |
1 | 11,457,460 | 0 | None | 2 Dec 2024, 2:43:20 UTC |
| 1962 | rbca  |
1 | 10,476,316 | 196 | Australia | 3 Feb 2017, 2:17:58 UTC |
| 1963 | wtweldon  |
1 | 1,503,963 | 0 | None | 27 Jan 2024, 14:20:00 UTC |
| 1964 | skildude   |
1 | 300,333,240 | 5,317 | United States | 29 Apr 2017, 5:04:40 UTC |
| 1965 | 8-bit Bulgarian microcomputer Pyldin-601  |
1 | 8,162,415 | 0 | Bulgaria | 8 Dec 2025, 0:59:59 UTC |
| 1966 | Mac  |
1 | 205,086 | 0 | United States | 30 Dec 2025, 14:32:50 UTC |
| 1967 | Sofia |
1 | 1,121,136 | 0 | Russia | 23 Dec 2025, 8:31:18 UTC |
| 1968 | Baltin |
1 | 203,185,346 | 1 | Guam | 24 Aug 2024, 23:17:33 UTC |
| 1969 | Andrii Dokaniev | 1 | 82,034 | 0 | Slovakia | 26 Jan 2026, 1:24:42 UTC |
| 1970 | doodguy  |
1 | 4,675,956 | 0 | United States | 8 Dec 2025, 8:12:46 UTC |
| 1971 | Gregory Flood |
1 | 3,664,200 | 6 | United States | 18 Dec 2023, 1:43:55 UTC |
| 1972 | petahunt |
1 | 369,154 | 0 | Australia | 7 Aug 2025, 14:36:22 UTC |
| 1973 | OskariTB  |
0 | 109,379 | 0 | Finland | 22 Jan 2026, 21:42:25 UTC |
| 1974 | zuevs |
0 | 6,412,350 | 0 | Russia | 25 Jun 2024, 14:04:05 UTC |
| 1975 | Paweł Jaskuła |
0 | 4,183,750 | 0 | Poland | 1 Dec 2025, 9:51:57 UTC |
| 1976 | robin   |
0 | 104,723,650 | 743 | International | 10 Dec 2020, 17:39:59 UTC |
| 1977 | Lambert von Berswordt-Wallrabe |
0 | 136,724 | 0 | Germany | 25 Dec 2025, 15:11:15 UTC |
| 1978 | Louis   |
0 | 35,438,828 | 279 | International | 17 Mar 2020, 14:44:36 UTC |
| 1979 | SirjjkfrasMPks5x7CUnK658RUX |
0 | 25,280,244 | 139 | United States | 30 Jan 2017, 6:09:49 UTC |
| 1980 | wLzw5zx3nyWpyajeYnBsb1YYDGt |
0 | 13,146,000 | 59 | United States | 3 Sep 2022, 18:47:15 UTC |
©2026 Sergei Chernykh