| Date | User | Challenge | Score |
| Beethoven3 | Smooth Criminal | 60 | |
| confucius | Hex | 5 | |
| Adeka228 | Oh SNAP | 120 | |
| aidanak | Chinese Remainder Theorem | 40 | |
| ngynmq | Script Kiddie | 70 | |
| confucius | ASCII | 5 | |
| aidanak | Modular Square Root | 35 | |
| purple_rabbit | Modular Inverting | 25 | |
| Roudi | Hex | 5 | |
| Roudi | ASCII | 5 | |
| Roudi | Great Snakes | 3 | |
| confucius | Great Snakes | 3 | |
| aidanak | Legendre Symbol | 35 | |
| confucius | Finding Flags | 2 | |
| kazhymukan | Pad Thai | 80 | |
| Jinx | Private Keys | 20 | |
| aidanak | Quadratic Residues | 25 | |
| Jinx | Euler's Totient | 20 | |
| trcmaster | Bytes and Big Integers | 10 | |
| Roudi | Finding Flags | 2 | |
| pvl_cks | XOR Starter | 10 | |
| dwaeji | Passwords as Keys | 50 | |
| Rohan_K | ASCII | 5 | |
| Rohan_K | Great Snakes | 3 | |
| 1celand | Favourite byte | 20 | |
| BackDoorRat | You either know, XOR you don't | 30 | |
| ghaisan | Network Attacks | 5 | |
| PanagiotisK | Confusion through Substitution | 25 | |
| ajalbani | You either know, XOR you don't | 30 | |
| Mppl2437 | Efficient Exchange | 50 | |
| 1celand | XOR Properties | 15 | |
| ajalbani | Favourite byte | 20 | |
| Adeka228 | Dancing Queen | 120 | |
| ajalbani | XOR Properties | 15 | |
| purple_rabbit | Modular Arithmetic 2 | 20 | |
| ajalbani | XOR Starter | 10 | |
| ajalbani | Bytes and Big Integers | 10 | |
| engman | Real Eisenstein | 150 | |
| Bonolori404 | Base64 | 10 | |
| ajalbani | Base64 | 10 | |
| Mppl2437 | Curves and Logs | 40 | |
| gk24msc | CERTainly not | 30 | |
| Jinx | Unencryptable | 125 | |
| Dgcg | Infinite Descent | 50 | |
| pvl_cks | Bytes and Big Integers | 10 | |
| ajalbani | Hex | 5 | |
| ajalbani | ASCII | 5 | |
| senynmaman | Bean Counter | 60 | |
| Bonolori404 | Hex | 5 | |
| 1celand | XOR Starter | 10 |
You are now level Current level