| Date | User | Challenge | Score |
| Anonimaps | Finding Flags | 2 | |
| hienthao123 | Modular Exponentiation | 10 | |
| EngelsGutierrez | Bringing It All Together | 50 | |
| l3r0y | Extended GCD | 20 | |
| nzo | Legendre Symbol | 35 | |
| EngelsGutierrez | Diffusion through Permutation | 30 | |
| lon1zzy | You either know, XOR you don't | 30 | |
| rfmph | Privacy-Enhanced Mail? | 25 | |
| lon1zzy | Favourite byte | 20 | |
| Av11ci73b | ASCII | 5 | |
| lon1zzy | XOR Properties | 15 | |
| lon1zzy | XOR Starter | 10 | |
| EngelsGutierrez | Confusion through Substitution | 25 | |
| lon1zzy | Bytes and Big Integers | 10 | |
| hbommi | Great Snakes | 3 | |
| MARTABAKMANIS | Extended GCD | 20 | |
| lon1zzy | Base64 | 10 | |
| lon1zzy | Hex | 5 | |
| hbommi | Finding Flags | 2 | |
| lon1zzy | ASCII | 5 | |
| EngelsGutierrez | Round Keys | 20 | |
| lon1zzy | Great Snakes | 3 | |
| lon1zzy | Finding Flags | 2 | |
| EngelsGutierrez | Structure of AES | 15 | |
| 1595844086 | Quadratic Residues | 25 | |
| EngelsGutierrez | Resisting Bruteforce | 10 | |
| winglet | Adrien's Signs | 80 | |
| EngelsGutierrez | Keyed Permutations | 5 | |
| Av11ci73b | Great Snakes | 3 | |
| 1595844086 | Modular Inverting | 25 | |
| 1595844086 | Modular Arithmetic 2 | 20 | |
| rfmph | Lemur XOR | 40 | |
| LACiA | Couples | 100 | |
| 1595844086 | Modular Arithmetic 1 | 20 | |
| DropletU | Finding Flags | 2 | |
| 1595844086 | Extended GCD | 20 | |
| rfmph | Encoding Challenge | 40 | |
| HectorTheGreat | Base64 | 10 | |
| Holfelder | Square Eyes | 35 | |
| 1595844086 | Greatest Common Divisor | 15 | |
| HectorTheGreat | Hex | 5 | |
| NoBirdWasHam | Twisted CSIDH Isogenies | 70 | |
| rfmph | Network Attacks | 5 | |
| rfmph | Moving Problems | 150 | |
| entheo97 | Euler's Totient | 20 | |
| Aybseravat03 | Finding Flags | 2 | |
| letienthanh | Base64 | 10 | |
| D3FAULTH | Network Attacks | 5 | |
| D3FAULTH | Great Snakes | 3 | |
| alexcy | ECB CBC WTF | 55 |
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