| Date | User | Challenge | Score |
| hamza8520 | Modular Inverting | 25 | |
| salmajaadi | Modular Square Root | 35 | |
| hamza8520 | Modular Arithmetic 2 | 20 | |
| eneo | Lemur XOR | 40 | |
| hamza8520 | Modular Arithmetic 1 | 20 | |
| babkar | Favourite byte | 20 | |
| eneo | You either know, XOR you don't | 30 | |
| aidanak | RSA Signatures | 25 | |
| aidananana | Salty | 20 | |
| Vakyo | Hex | 5 | |
| Assel | Private Keys | 20 | |
| aidananana | Manyprime | 40 | |
| Assel | Euler's Totient | 20 | |
| xfnx | The Matrix | 75 | |
| linhkhong | Hex | 5 | |
| alstonchen | Finding Flags | 2 | |
| aidanak | RSA Decryption | 20 | |
| Assel | Public Keys | 15 | |
| LoftyCheese | Quadratic Residues | 25 | |
| xfnx | Script Kiddie | 70 | |
| Assel | Modular Exponentiation | 10 | |
| linhkhong | ASCII | 5 | |
| tenary | Curveball | 100 | |
| xfnx | Additive | 70 | |
| sseo902 | Base64 | 10 | |
| tomi | Base64 | 10 | |
| Gaeul | Base64 | 10 | |
| yusun | Base64 | 10 | |
| aidanak | Private Keys | 20 | |
| linhkhong | Great Snakes | 3 | |
| aidanak | Euler's Totient | 20 | |
| happyjjk | Base64 | 10 | |
| soyun_0111 | Base64 | 10 | |
| linhkhong | Finding Flags | 2 | |
| aidanak | Public Keys | 15 | |
| volker_racho | Resisting Bruteforce | 10 | |
| gintern | Base64 | 10 | |
| volker_racho | Keyed Permutations | 5 | |
| happyjjk | Hex | 5 | |
| aidanak | Modular Exponentiation | 10 | |
| xfnx | Let's Decrypt | 80 | |
| cyb_org | JWT Sessions | 10 | |
| gintern | Hex | 5 | |
| ezhpry | Chinese Remainder Theorem | 40 | |
| volker_racho | Modular Square Root | 35 | |
| gintern | ASCII | 5 | |
| Gaeul | Hex | 5 | |
| gintern | Great Snakes | 3 | |
| xfnx | Ron was Wrong, Whit is Right | 90 | |
| gintern | Finding Flags | 2 |
You are now level Current level