| Date | User | Challenge | Score |
| jadeofdaguanyuan | Base64 | 10 | |
| vaalemax | ASCII | 5 | |
| Slucku | ASCII | 5 | |
| akkurl | Hex | 5 | |
| ShubaDuck | Working with Fields | 10 | |
| Slucku | Great Snakes | 3 | |
| Slucku | Finding Flags | 2 | |
| w4llnut | Adrien's Signs | 80 | |
| jablonskim | Euler's Totient | 20 | |
| jablonskim | Public Keys | 15 | |
| jablonskim | Modular Exponentiation | 10 | |
| akkurl | ASCII | 5 | |
| alaouinadi | Flipping Cookie | 60 | |
| vaalemax | Great Snakes | 3 | |
| bluflag | Great Snakes | 3 | |
| vaalemax | Finding Flags | 2 | |
| bluflag | Finding Flags | 2 | |
| tjasinko | Hex | 5 | |
| zhacutis1tg | Favourite byte | 20 | |
| alaouinadi | ECB CBC WTF | 55 | |
| khanhlm091 | Modular Inverting | 25 | |
| gorje | Network Attacks | 5 | |
| DangKhoaVox | ASCII | 5 | |
| 0x6j | You either know, XOR you don't | 30 | |
| tjasinko | ASCII | 5 | |
| zhacutis1tg | XOR Properties | 15 | |
| gorje | Modular Arithmetic 2 | 20 | |
| shamandeer | Chinese Remainder Theorem | 40 | |
| Ameer | XOR Starter | 10 | |
| tjasinko | Great Snakes | 3 | |
| crystaljade | Factoring | 15 | |
| tjasinko | Finding Flags | 2 | |
| Abdullah5565 | SSH Keys | 35 | |
| jadeofdaguanyuan | Hex | 5 | |
| Dar1us | SSH Keys | 35 | |
| b1rd13 | You either know, XOR you don't | 30 | |
| AlarmW | Modular Inverting | 25 | |
| kumzalo | Modular Inverting | 25 | |
| Abdullah5565 | CERTainly not | 30 | |
| b1rd13 | Favourite byte | 20 | |
| Abdullah5565 | Privacy-Enhanced Mail? | 25 | |
| TheLPSC | Modular Inverting | 25 | |
| Roseae | Modular Inverting | 25 | |
| 0x6j | Favourite byte | 20 | |
| jkkwan27 | Gotta Go Fast | 40 | |
| 756TrollerLujanC | Modular Arithmetic 2 | 20 | |
| 0x6j | XOR Properties | 15 | |
| Abdullah5565 | Modular Inverting | 25 | |
| Abdullah5565 | Modular Arithmetic 2 | 20 | |
| Abdullah5565 | Modular Arithmetic 1 | 20 |
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