| Date | User | Challenge | Score |
| khanhtai | Cofactor Cofantasy | 150 | |
| Nellle | You either know, XOR you don't | 30 | |
| Namunamu | Prime and Prejudice | 200 | |
| Nellle | Favourite byte | 20 | |
| thaggs1066 | Export-grade | 100 | |
| Nellle | XOR Properties | 15 | |
| tode | Square Eyes | 35 | |
| tode | Inferius Prime | 30 | |
| keydownmonkey | Bytes and Big Integers | 10 | |
| saic | Finding Flags | 2 | |
| fjukh7872 | Jeff's LFSR | 150 | |
| khanhtai | Real Eisenstein | 150 | |
| Nellle | XOR Starter | 10 | |
| khanhtai | What's a Lattice? | 40 | |
| maousi | ZKP Introduction | 5 | |
| merl1n | Bytes and Big Integers | 10 | |
| khanhtai | Size and Basis | 15 | |
| yhx | Chinese Remainder Theorem | 40 | |
| khanhtai | Vectors | 10 | |
| user1841751 | Base64 | 10 | |
| yhx | Modular Square Root | 35 | |
| cak3man | Legendre Symbol | 35 | |
| user1841751 | Hex | 5 | |
| Pepsi | Bytes and Big Integers | 10 | |
| user1841751 | ASCII | 5 | |
| user1841751 | Great Snakes | 3 | |
| yhx | Legendre Symbol | 35 | |
| cak3man | Quadratic Residues | 25 | |
| user1841751 | Finding Flags | 2 | |
| datasquirel | Quadratic Residues | 25 | |
| cak3man | Resisting Bruteforce | 10 | |
| cak3man | Keyed Permutations | 5 | |
| pemula1 | XOR Properties | 15 | |
| Pichmeow | Greatest Common Divisor | 15 | |
| Pepsi | Base64 | 10 | |
| delinita | Bytes and Big Integers | 10 | |
| pemula1 | XOR Starter | 10 | |
| dispossable | Export-grade | 100 | |
| 0xh3b3 | Extended GCD | 20 | |
| delinita | Base64 | 10 | |
| delinita | Hex | 5 | |
| Pichmeow | You either know, XOR you don't | 30 | |
| mahmud_world | Great Snakes | 3 | |
| mahmud_world | Finding Flags | 2 | |
| s1ny4nz | Encoding Challenge | 40 | |
| khanhtai | Unencryptable | 125 | |
| cttg8217 | Legendre Symbol | 35 | |
| ciphermk | Legendre Symbol | 35 | |
| sqv1nx | Confusion through Substitution | 25 | |
| Pichmeow | Favourite byte | 20 |
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