| Date | User | Challenge | Score |
| flower2 | Hex | 5 | |
| pocketclown | Structure of AES | 15 | |
| Kiko112 | Greatest Common Divisor | 15 | |
| 1117777 | Quadratic Residues | 25 | |
| 271leni | Encoding Challenge | 40 | |
| 1117777 | Modular Inverting | 25 | |
| 271leni | Bytes and Big Integers | 10 | |
| 271leni | Base64 | 10 | |
| 1117777 | Modular Arithmetic 2 | 20 | |
| 271leni | Hex | 5 | |
| s1ny4nz | Keyed Permutations | 5 | |
| 1117777 | Modular Arithmetic 1 | 20 | |
| 271leni | ASCII | 5 | |
| flower2 | ASCII | 5 | |
| Tactical_Nerd | Monoprime | 30 | |
| Tactical_Nerd | Factoring | 15 | |
| d0lmiodawg | Adrien's Signs | 80 | |
| Tactical_Nerd | RSA Signatures | 25 | |
| Arielonchis | Hex | 5 | |
| Auspiow | Modular Square Root | 35 | |
| Arielonchis | ASCII | 5 | |
| PatrickL_SC | Endless Emails | 150 | |
| pocketclown | Resisting Bruteforce | 10 | |
| atakilti | Favourite byte | 20 | |
| harjottelu | Quadratic Residues | 25 | |
| pocketclown | Keyed Permutations | 5 | |
| yuyuchi | Scalar Multiplication | 35 | |
| harjottelu | Modular Inverting | 25 | |
| cahidenes | Missing Modulus | 80 | |
| p3riwinkle | Hex | 5 | |
| p3riwinkle | ASCII | 5 | |
| arwey7 | Hex | 5 | |
| arwey7 | ASCII | 5 | |
| harjottelu | Modular Arithmetic 2 | 20 | |
| harjottelu | Modular Arithmetic 1 | 20 | |
| harjottelu | Extended GCD | 20 | |
| p3riwinkle | Great Snakes | 3 | |
| harjottelu | Greatest Common Divisor | 15 | |
| arwey7 | Great Snakes | 3 | |
| harjottelu | You either know, XOR you don't | 30 | |
| daniel77xd_ | Base64 | 10 | |
| arwey7 | Finding Flags | 2 | |
| p3riwinkle | Finding Flags | 2 | |
| harjottelu | Favourite byte | 20 | |
| harjottelu | XOR Properties | 15 | |
| pocketclown | Modular Binomials | 80 | |
| JanithW | XOR Properties | 15 | |
| atakilti | XOR Properties | 15 | |
| NatsuGwada | You either know, XOR you don't | 30 | |
| NatsuGwada | Favourite byte | 20 |
You are now level Current level