| Date | User | Challenge | Score |
| yuyuuyu | Hex | 5 | |
| scheme | Bean Counter | 60 | |
| Kad | Passwords as Keys | 50 | |
| yuyuuyu | ASCII | 5 | |
| yuyuuyu | Great Snakes | 3 | |
| yuyuuyu | Finding Flags | 2 | |
| Kad | Modes of Operation Starter | 15 | |
| Kad | Bringing It All Together | 50 | |
| gabriellino1936 | Modular Arithmetic 1 | 20 | |
| gabriellino1936 | Extended GCD | 20 | |
| ROPShade | Finding Flags | 2 | |
| magda_almpani | Lemur XOR | 40 | |
| Finou | Favourite byte | 20 | |
| m7mdn | Transparency | 50 | |
| Finou | XOR Properties | 15 | |
| magda_almpani | Encoding Challenge | 40 | |
| 0xSh4d0w6 | Extended GCD | 20 | |
| Finou | XOR Starter | 10 | |
| KrunkerIO | You either know, XOR you don't | 30 | |
| 0ary | XOR Starter | 10 | |
| scheme | Symmetry | 50 | |
| Finou | Bytes and Big Integers | 10 | |
| Finou | Base64 | 10 | |
| 0xSh4d0w6 | Greatest Common Divisor | 15 | |
| Finou | Hex | 5 | |
| veiko | Modular Binomials | 80 | |
| magda_almpani | Passwords as Keys | 50 | |
| Finou | ASCII | 5 | |
| veiko | Adrien's Signs | 80 | |
| Finou | Great Snakes | 3 | |
| ahmqd | Let's Prove It | 120 | |
| veiko | Chinese Remainder Theorem | 40 | |
| nc4 | Bytes and Big Integers | 10 | |
| Finou | Finding Flags | 2 | |
| HardxHard | LWE Background | 5 | |
| veiko | Modular Square Root | 35 | |
| Ter3Sni | Point Addition | 30 | |
| veiko | Legendre Symbol | 35 | |
| gabriellino1936 | Greatest Common Divisor | 15 | |
| zsoli | Quadratic Residues | 25 | |
| magda_almpani | Modes of Operation Starter | 15 | |
| gabriellino1936 | You either know, XOR you don't | 30 | |
| nicw33 | XOR Starter | 10 | |
| nicw33 | Bytes and Big Integers | 10 | |
| calebdotee | Hex | 5 | |
| gabriellino1936 | Favourite byte | 20 | |
| calebdotee | ASCII | 5 | |
| calebdotee | Great Snakes | 3 | |
| gabriellino1936 | XOR Properties | 15 | |
| gprendi | Quadratic Residues | 25 |
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