| Date | User | Challenge | Score |
| Mat_ | XOR Starter | 10 | |
| agentmon | Hex | 5 | |
| HarryBOB | Legendre Symbol | 35 | |
| agentmon | ASCII | 5 | |
| agentmon | Great Snakes | 3 | |
| hansus | Greatest Common Divisor | 15 | |
| seokjong | Modular Inverting | 25 | |
| mochaowo | Euler's Totient | 20 | |
| wylited | XOR Properties | 15 | |
| Sharan07 | Hex | 5 | |
| shadowxt | Base64 | 10 | |
| mochaowo | Public Keys | 15 | |
| PIkapikaHei | Favourite byte | 20 | |
| mochaowo | Modular Exponentiation | 10 | |
| wylited | XOR Starter | 10 | |
| Sharan07 | ASCII | 5 | |
| glowingcleaver | Base64 | 10 | |
| seokjong | Modular Arithmetic 2 | 20 | |
| Noe2010 | Bytes and Big Integers | 10 | |
| Lamanade | Saying Hello | 20 | |
| mangchya069 | Modular Arithmetic 1 | 20 | |
| Scam | Modular Inverting | 25 | |
| mochaowo | Bean Counter | 60 | |
| seokjong | Modular Arithmetic 1 | 20 | |
| gennadion | Modular Square Root | 35 | |
| saviurzz | You either know, XOR you don't | 30 | |
| Scam | Modular Arithmetic 2 | 20 | |
| Lamanade | TLS Handshake | 15 | |
| mangchya069 | Extended GCD | 20 | |
| seokjong | Extended GCD | 20 | |
| seokjong | Greatest Common Divisor | 15 | |
| mangchya069 | Greatest Common Divisor | 15 | |
| Lamanade | Sharks on the Wire | 10 | |
| yuri981 | Modular Arithmetic 2 | 20 | |
| shadowxt | Hex | 5 | |
| Lamanade | Secure Protocols | 5 | |
| PriyanshuPansari | Symmetry | 50 | |
| JunhyeongShin | Bean Counter | 60 | |
| Ter3Sni | Factoring | 15 | |
| JunhyeongShin | Symmetry | 50 | |
| Sharan07 | Great Snakes | 3 | |
| PIkapikaHei | XOR Properties | 15 | |
| Antoine_crypto | MD0 | 80 | |
| shadowxt | ASCII | 5 | |
| JunhyeongShin | Lazy CBC | 60 | |
| Persi | Finding Flags | 2 | |
| emadig4 | Generators of Groups | 20 | |
| PIkapikaHei | XOR Starter | 10 | |
| ZUIEKI_kicktv | Finding Flags | 2 | |
| PriyanshuPansari | Flipping Cookie | 60 |
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