| Date | User | Challenge | Score |
| XARALAMPOS_OIK | Euler's Totient | 20 | |
| XARALAMPOS_OIK | Public Keys | 15 | |
| XARALAMPOS_OIK | Modular Exponentiation | 10 | |
| ethicxz | Extended GCD | 20 | |
| nikosn | Base64 | 10 | |
| Voron | Adrien's Signs | 80 | |
| TheCoin | Finding Flags | 2 | |
| osihlovec | Saying Hello | 20 | |
| ethicxz | Greatest Common Divisor | 15 | |
| perlica | Privacy-Enhanced Mail? | 25 | |
| redsora | XOR Properties | 15 | |
| Sasiskamalun | Legendre Symbol | 35 | |
| Avanish | Base64 | 10 | |
| sewulas | Round Keys | 20 | |
| ethicxz | Lemur XOR | 40 | |
| sewulas | Structure of AES | 15 | |
| osihlovec | TLS Handshake | 15 | |
| Avanish | Hex | 5 | |
| Oswald | Stream of Consciousness | 80 | |
| osihlovec | Sharks on the Wire | 10 | |
| nikosn | Hex | 5 | |
| ethicxz | You either know, XOR you don't | 30 | |
| 23EC071_LIKITH | Favourite byte | 20 | |
| Avanish | ASCII | 5 | |
| redsora | XOR Starter | 10 | |
| ethicxz | Favourite byte | 20 | |
| alzzz | Keyed Permutations | 5 | |
| perlica | Modular Inverting | 25 | |
| 23EC071_LIKITH | XOR Properties | 15 | |
| Kyle_0215 | Modular Inverting | 25 | |
| Rimsha1997 | Hex | 5 | |
| Voron | Chinese Remainder Theorem | 40 | |
| ethicxz | XOR Properties | 15 | |
| Avanish | Great Snakes | 3 | |
| perlica | Modular Arithmetic 2 | 20 | |
| nikosn | ASCII | 5 | |
| Z5 | Euler's Totient | 20 | |
| perlica | Modular Arithmetic 1 | 20 | |
| nathan_brt | Round Keys | 20 | |
| Hansi | Successive Powers | 60 | |
| stibro | Finding Flags | 2 | |
| Rimsha1997 | ASCII | 5 | |
| Kris255 | ASCII | 5 | |
| ethicxz | XOR Starter | 10 | |
| Kyle_0215 | Modular Arithmetic 2 | 20 | |
| ethicxz | Encoding Challenge | 40 | |
| redsora | Bytes and Big Integers | 10 | |
| Thinh_3485 | ASCII | 5 | |
| veexcell | Great Snakes | 3 | |
| Oswald | Logon Zero | 80 |
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