PrimeGridは定期的にチャレンジ（解析対象を一つに絞って、世界中でスコアを競い合うお祭り）が行われています。
| チャレンジ名 | 日付（UTC：日本時間では＋9時間） | 期間 | 解析対象 | クレジット | 順位 | 獲得ポイント | チーム成績 | 個人成績 |
| Conjunction of Venus & Jupiter Challenge | 2019/1/7 05:43:00 ～ 2019/1/22 05:43:00 | 15days | SoB-LLR | 8,572,461.13 | 13 | 742.50 | Individuals | Teams |
| Year of the Pig Challenge | 2019/5/5 18:00:00 ～ 2019/5/10 18:00:00 | 5days | GCW-LLR | 1,826,077.25 | 13 | 412.50 | Individuals | Teams |
| Hans Ivar Riesel's 90th Birthday Challenge | 2019/5/24 00:00:00 ～ 2019/5/31 00:00:00 | 7days | TRP-LLR | 3,432,726.94 | 16 | 450.00 | Individuals | Teams |
| 50th Anniversary of the Moon Landing Challenge | 2019/7/15 20:17:00 ～ 2019/7/20 20:17:00 | 5days | PPS-LLR | | | | | |
| Lennart Vogel Honorary Challenge | 2019/8/3 00:00:00 ～ 2019/8/10 00:00:00 | 7days | ESP-LLR | | | | | |
| Oktoberfest Challenge | 2019/9/21 11:00:00 ～ 2019/9/26 11:00:00 | 5days | AP27 | | | | | |
| 50 years First ARPANET Connection Challenge | 2019/10/24 0:000:00 ～ 2019/10/29 00:00:00 | 5days | 321-LLR | | | | | |
| Transit of Mercury Across the Sun Challenge | 2019/11/1 18:04:00 ～ 2019/11/11 18:04:00 | 10days | PSP-LLR | | | | | |
| Aussie, Aussie, Aussie! Oi! Oi! Oi! Summer Solstice Challenge | 2019/12/12 04:19:00 ～ 2019/12/22 04:19:00 | 10days | GFN-21・GFN-22・GFN-DYFL | | | | | |
| 2019年 総合成績 | 14 | 1,605.00 | | |
| チャレンジ名 | 日付（UTC：日本時間では＋9時間） | 期間 | 解析対象 | クレジット | 順位 | 獲得ポイント | チーム成績 | 個人成績 |
| Happy New Year Challenge | 2018/1/1 00:00:00 ～ 2018/1/16 00:00:00 | 15days | SoB-LLR | 7,533,409.99 | 14 | 720.00 | Individuals | Teams |
| Year of the Dog Challenge | 2018/3/16 18:00:00 ～ 2018/3/23 18:00:00 | 7days | 321-LLR | 2,476,031.42 | 14 | 480.00 | Individuals | Teams |
| Mathematics Awareness Month Challenge | 2018/4/3 12:00:00 ～ 2018/4/8 12:00:00 | 5days | ESP-LLR | 1,604,122.93 | 11 | 437.50 | Individuals | Teams |
| World Cup Challenge | 2018/6/14 00:00:00 ～ 2018/6/19 00:00:00 | 5days | SR5-LLR | 1,888,386.66 | 13 | 412.50 | Individuals | Teams |
| Solar Eclipse Challenge | 2018/8/10 18:00:00 ～ 2018/8/13 18:00:00 | 3days | PPS-LLR | 800,758.91 | 13 | 330.00 | Individuals | Teams |
| Oktoberfest Challenge | 2018/9/15 18:00:00 ～ 2018/9/22 18:00:00 | 7days | CUL-LLR | 2,521,592.79 | 13 | 495.00 | Individuals | Teams |
| Halloween Challenge | 2018/10/24 23:59:59 ～ 2018/10/31 23:59:59 | 5days | 321-LLR | 1,677,798.15 | 13 | 495.00 | Individuals | Teams |
| Leonids Shower Challenge | 2018/11/17 12:00:00 ～ 2018/11/20 12:00:00 | 3days | AP27 | 2,211,521.00 | 19 | 270.00 | Individuals | Teams |
| Winter Solstice Challenge | 2018/12/11 22:23:00 ～ 2018/12/21 22:23:00 | 10days | GFN-21 | 33,824,250.94 | 13 | 660.00 | Individuals | Teams |
| 2018年 総合成績 | 12 | 4,300.00 | | |
![[PukiWiki]](image/pukiwiki.png "[PukiWiki]")
