| Date | User | Challenge | Score |
| Lautaro307 | CERTainly not | 30 | |
| Lautaro307 | Privacy-Enhanced Mail? | 25 | |
| Lautaro307 | Modular Inverting | 25 | |
| Zeras | Euler's Totient | 20 | |
| Grupo07MA | Modular Exponentiation | 10 | |
| Lautaro307 | Modular Arithmetic 2 | 20 | |
| EmmaGuren | Token Appreciation | 5 | |
| Lautaro307 | Modular Arithmetic 1 | 20 | |
| dwarfy88 | XOR Starter | 10 | |
| ignacioPereyra | Token Appreciation | 5 | |
| Zeras | Public Keys | 15 | |
| Zeras | Modular Exponentiation | 10 | |
| grupo52026 | Euler's Totient | 20 | |
| mrlorka | Public Keys | 15 | |
| mrlorka | Modular Exponentiation | 10 | |
| Lautaro307 | Extended GCD | 20 | |
| Lautaro307 | Greatest Common Divisor | 15 | |
| Lautaro307 | Lemur XOR | 40 | |
| labcoxyzl | Additional problems (CSC Belgium) | 0 | |
| mrlorka | Bytes and Big Integers | 10 | |
| Lautaro307 | You either know, XOR you don't | 30 | |
| Lautaro307 | Favourite byte | 20 | |
| Lautaro307 | XOR Properties | 15 | |
| Lautaro307 | XOR Starter | 10 | |
| HardxHard | Computing Public Values | 25 | |
| zyte09 | Great Snakes | 3 | |
| Kynthsi577 | Bytes and Big Integers | 10 | |
| mrlorka | Base64 | 10 | |
| mrlorka | Hex | 5 | |
| Lagg0s | Encoding Challenge | 40 | |
| mrlorka | ASCII | 5 | |
| zyte09 | Finding Flags | 2 | |
| mrlorka | Great Snakes | 3 | |
| ThinKing | Secure Protocols | 5 | |
| mrlorka | Finding Flags | 2 | |
| HardxHard | Generators of Groups | 20 | |
| 0x90 | RSA Decryption | 20 | |
| ThinKing | TLS Handshake | 15 | |
| 0x90 | Private Keys | 20 | |
| Kynthsi577 | Base64 | 10 | |
| 0x90 | Euler's Totient | 20 | |
| 0x90 | Public Keys | 15 | |
| Kynthsi577 | Hex | 5 | |
| ThinKing | Sharks on the Wire | 10 | |
| 0x90 | Modular Exponentiation | 10 | |
| Kynthsi577 | ASCII | 5 | |
| alzzz | Symmetry | 50 | |
| Ender_hakeri | Greatest Common Divisor | 15 | |
| oleg_magalyas | RSA Decryption | 20 | |
| oleg_magalyas | Private Keys | 20 |
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