| Date | User | Challenge | Score |
| fd | Legendre Symbol | 35 | |
| ZanCTF | CTRIME | 70 | |
| g3k1 | CERTainly not | 30 | |
| landerson_ | Encoding Challenge | 40 | |
| Neoplatonist | Hex | 5 | |
| Lupchic | Deriving Symmetric Keys | 40 | |
| kikipaul | Bytes and Big Integers | 10 | |
| 1dory1 | SSH Keys | 35 | |
| fd | Quadratic Residues | 25 | |
| mboh2 | Public Keys | 15 | |
| Neoplatonist | ASCII | 5 | |
| starplatinum | ASCII | 5 | |
| Lupchic | Computing Shared Secrets | 30 | |
| g3k1 | Privacy-Enhanced Mail? | 25 | |
| MrCobblepot | Broken RSA | 100 | |
| 1dory1 | CERTainly not | 30 | |
| gagas | Greatest Common Divisor | 15 | |
| Neoplatonist | Great Snakes | 3 | |
| starplatinum | Finding Flags | 2 | |
| 1dory1 | Privacy-Enhanced Mail? | 25 | |
| Lupchic | Computing Public Values | 25 | |
| Lupchic | Generators of Groups | 20 | |
| Neoplatonist | Finding Flags | 2 | |
| kikipaul | Base64 | 10 | |
| g3k1 | Modular Inverting | 25 | |
| Lupchic | Working with Fields | 10 | |
| VoidQuery | ASCII | 5 | |
| Lupchic | Modulus Inutilis | 50 | |
| landerson_ | Network Attacks | 5 | |
| Lupchic | Salty | 20 | |
| VoidQuery | Great Snakes | 3 | |
| sayai | Chinese Remainder Theorem | 40 | |
| Lupchic | Manyprime | 40 | |
| VoidQuery | Finding Flags | 2 | |
| kikipaul | Hex | 5 | |
| RIZKYFAJAR21 | Successive Powers | 60 | |
| 1dory1 | Modular Inverting | 25 | |
| Arsenii | ProSign 3 | 100 | |
| Raccoon42 | Non-Interactive | 35 | |
| kikipaul | ASCII | 5 | |
| g3k1 | Modular Arithmetic 2 | 20 | |
| The_cryptic | Finding Flags | 2 | |
| Revi | Bean Counter | 60 | |
| 1dory1 | Modular Arithmetic 2 | 20 | |
| sixsquareAI | Authenticated Handshake | 40 | |
| RIZKYFAJAR21 | Chinese Remainder Theorem | 40 | |
| DhamoZx | Salty | 20 | |
| Denis_Roc | Null or Never | 100 | |
| 1dory1 | Modular Arithmetic 1 | 20 | |
| landerson_ | CERTainly not | 30 |
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