| Date | User | Challenge | Score |
| Nat303 | Modular Arithmetic 2 | 20 | |
| Nat303 | Modular Arithmetic 1 | 20 | |
| Nat303 | Extended GCD | 20 | |
| CaptainCloverman | Quadratic Residues | 25 | |
| Nat303 | Greatest Common Divisor | 15 | |
| naslan | Bytes and Big Integers | 10 | |
| maejikal | Chinese Remainder Theorem | 40 | |
| sharl0k | ASCII | 5 | |
| naslan | Base64 | 10 | |
| tulgaaa | Great Snakes | 3 | |
| JOJAR | Endless Emails | 150 | |
| tulgaaa | Finding Flags | 2 | |
| Vhuy | XOR Starter | 10 | |
| Grace259 | ASCII | 5 | |
| WaweruMauree | You either know, XOR you don't | 30 | |
| WaweruMauree | Favourite byte | 20 | |
| whoiswhois | WOTS Up 2 | 90 | |
| WaweruMauree | XOR Properties | 15 | |
| WaweruMauree | XOR Starter | 10 | |
| 048224 | Round Keys | 20 | |
| naslan | Hex | 5 | |
| testererr | XOR Starter | 10 | |
| WaweruMauree | Bytes and Big Integers | 10 | |
| Ucandoit | XOR Starter | 10 | |
| naslan | ASCII | 5 | |
| naslan | Great Snakes | 3 | |
| Frederik353 | Deriving Symmetric Keys | 40 | |
| naslan | Finding Flags | 2 | |
| hassan_kulu | Modular Arithmetic 1 | 20 | |
| Dexecuting | Modular Binomials | 80 | |
| CaptainCloverman | Modular Inverting | 25 | |
| Dexecuting | Adrien's Signs | 80 | |
| soleman | XOR Starter | 10 | |
| RichardK | Adrien's Signs | 80 | |
| Dexecuting | Chinese Remainder Theorem | 40 | |
| Dexecuting | Modular Square Root | 35 | |
| Dexecuting | Legendre Symbol | 35 | |
| Frederik353 | Computing Shared Secrets | 30 | |
| Dexecuting | Quadratic Residues | 25 | |
| RichardK | Modular Binomials | 80 | |
| Dexecuting | Modular Inverting | 25 | |
| DEATH4U | ASCII | 5 | |
| JOJAR | Everything is Still Big | 100 | |
| DEATH4U | Great Snakes | 3 | |
| comarkezine | Modular Binomials | 80 | |
| RichardK | Chinese Remainder Theorem | 40 | |
| Grace259 | Great Snakes | 3 | |
| RichardK | Modular Square Root | 35 | |
| Thaimeo2006 | Couples | 100 | |
| comarkezine | Adrien's Signs | 80 |
You are now level Current level