| Date | User | Challenge | Score |
| boladjiVinou | Finding Flags | 2 | |
| Chaosdragon789 | Legendre Symbol | 35 | |
| HolyStrange | Great Snakes | 3 | |
| hakka52 | Greatest Common Divisor | 15 | |
| HolyStrange | Finding Flags | 2 | |
| eren45 | Hex | 5 | |
| MoltenGamaLC | XOR Starter | 10 | |
| MoltenGamaLC | Bytes and Big Integers | 10 | |
| eren45 | ASCII | 5 | |
| MoltenGamaLC | Base64 | 10 | |
| MoltenGamaLC | Hex | 5 | |
| MoltenGamaLC | ASCII | 5 | |
| MoltenGamaLC | Great Snakes | 3 | |
| useless | Privacy-Enhanced Mail? | 25 | |
| MoltenGamaLC | Finding Flags | 2 | |
| eren45 | Great Snakes | 3 | |
| alex_cornejo | Finding Flags | 2 | |
| teck | Modular Binomials | 80 | |
| kevinfra | Euler's Totient | 20 | |
| kevinfra | Public Keys | 15 | |
| mahmoud000 | XOR Starter | 10 | |
| adogwithnoenemy | XOR Properties | 15 | |
| teck | Adrien's Signs | 80 | |
| adogwithnoenemy | XOR Starter | 10 | |
| nomadii | Hex | 5 | |
| nomadii | ASCII | 5 | |
| adogwithnoenemy | Bytes and Big Integers | 10 | |
| caledt | Greatest Common Divisor | 15 | |
| nada_abdelhaq | Modular Arithmetic 1 | 20 | |
| nada_abdelhaq | Extended GCD | 20 | |
| adogwithnoenemy | Base64 | 10 | |
| Matsuda | XOR Properties | 15 | |
| nada_abdelhaq | Greatest Common Divisor | 15 | |
| Ah_Crypto2 | ECB CBC WTF | 55 | |
| ZacH123456789 | Jack's Birthday Hash | 20 | |
| nada_abdelhaq | You either know, XOR you don't | 30 | |
| enzolrsgnl | XOR Starter | 10 | |
| aa2166 | Greatest Common Divisor | 15 | |
| sheerwood | Generators of Groups | 20 | |
| enzolrsgnl | Bytes and Big Integers | 10 | |
| brsd | Network Attacks | 5 | |
| sheerwood | Working with Fields | 10 | |
| AnastaciaMuya | Bytes and Big Integers | 10 | |
| AnastaciaMuya | Base64 | 10 | |
| exoq | Greatest Common Divisor | 15 | |
| aboj | Confusion through Substitution | 25 | |
| Next0202 | XOR Starter | 10 | |
| brsd | Favourite byte | 20 | |
| werrvix | Finding Flags | 2 | |
| Bakhita | Finding Flags | 2 |
You are now level Current level