| Date | User | Challenge | Score |
| zczjyq | Modular Inverting | 25 | |
| sore | Base64 | 10 | |
| ZekkelAR | Extended GCD | 20 | |
| tackmin1204 | Lemur XOR | 40 | |
| qianchuan | Modular Square Root | 35 | |
| Charlie_Brown | Greatest Common Divisor | 15 | |
| gumbat70 | Round Keys | 20 | |
| gumbat70 | Structure of AES | 15 | |
| khanhtai | The Matrix Reloaded | 100 | |
| zczjyq | Modular Arithmetic 2 | 20 | |
| G1itch7 | Chinese Remainder Theorem | 40 | |
| zczjyq | Modular Arithmetic 1 | 20 | |
| Gengg_ | Export-grade | 100 | |
| qianchuan | Quadratic Residues | 25 | |
| qianchuan | Modular Inverting | 25 | |
| qianchuan | Modular Arithmetic 2 | 20 | |
| qianchuan | Modular Arithmetic 1 | 20 | |
| ck0d | Euler's Totient | 20 | |
| ck0d | Public Keys | 15 | |
| jackoha | RSA or HMAC? Part 2 | 100 | |
| ck0d | Modular Exponentiation | 10 | |
| Charlie_Brown | Favourite byte | 20 | |
| ck0d | Bringing It All Together | 50 | |
| entheo97 | Finding Flags | 2 | |
| wokwok | Hex | 5 | |
| Charlie_Brown | XOR Properties | 15 | |
| fibonnaci | Encoding Challenge | 40 | |
| facumat | XOR Properties | 15 | |
| 3077712412 | Modular Inverting | 25 | |
| 3077712412 | Modular Arithmetic 2 | 20 | |
| Cosmos2911 | Great Snakes | 3 | |
| ggerod | Background Reading | 5 | |
| 3077712412 | Modular Arithmetic 1 | 20 | |
| Charlie_Brown | XOR Starter | 10 | |
| facumat | XOR Starter | 10 | |
| 3077712412 | Extended GCD | 20 | |
| 3077712412 | Greatest Common Divisor | 15 | |
| ggerod | Export-grade | 100 | |
| fibonnaci | Bytes and Big Integers | 10 | |
| fibonnaci | Base64 | 10 | |
| votranngocvy | Modular Square Root | 35 | |
| fibonnaci | Hex | 5 | |
| fibonnaci | ASCII | 5 | |
| fibonnaci | Network Attacks | 5 | |
| fibonnaci | Great Snakes | 3 | |
| fibonnaci | Finding Flags | 2 | |
| Charlie_Brown | Bytes and Big Integers | 10 | |
| user467985982 | RSA Decryption | 20 | |
| jentopia | Confusion through Substitution | 25 | |
| facumat | Encoding Challenge | 40 |
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