| Date | User | Challenge | Score |
| Kanad3 | Gram Schmidt | 30 | |
| DxT3r | Round Keys | 20 | |
| Blackcat22 | ASCII | 5 | |
| cryptic_angelina | Modular Inverting | 25 | |
| cryptic_angelina | Modular Arithmetic 2 | 20 | |
| Kanad3 | Size and Basis | 15 | |
| zxo | Great Snakes | 3 | |
| cryptic_angelina | Modular Arithmetic 1 | 20 | |
| cryptic_angelina | Extended GCD | 20 | |
| jora_12 | Modular Arithmetic 1 | 20 | |
| zxo | Finding Flags | 2 | |
| sjoerd_r | Legendre Symbol | 35 | |
| cryptic_angelina | Greatest Common Divisor | 15 | |
| neggar123 | Greatest Common Divisor | 15 | |
| jora_12 | Extended GCD | 20 | |
| wannabehacker | You either know, XOR you don't | 30 | |
| wannabehacker | Favourite byte | 20 | |
| wannabehacker | XOR Properties | 15 | |
| nikky | Bytes and Big Integers | 10 | |
| foxkids33 | Modular Inverting | 25 | |
| cryptic_angelina | You either know, XOR you don't | 30 | |
| ivancuber | Extended GCD | 20 | |
| foxkids33 | Modular Arithmetic 2 | 20 | |
| foxkids33 | Modular Arithmetic 1 | 20 | |
| foxkids33 | Extended GCD | 20 | |
| Technoblade | XOR Properties | 15 | |
| foxkids33 | Greatest Common Divisor | 15 | |
| wannabehacker | XOR Starter | 10 | |
| wannabehacker | Bytes and Big Integers | 10 | |
| wannabehacker | Base64 | 10 | |
| foxkids33 | You either know, XOR you don't | 30 | |
| wannabehacker | Hex | 5 | |
| wannabehacker | ASCII | 5 | |
| wannabehacker | Great Snakes | 3 | |
| wannabehacker | Finding Flags | 2 | |
| cryptic_angelina | Favourite byte | 20 | |
| cryptic_angelina | XOR Properties | 15 | |
| foxkids33 | Favourite byte | 20 | |
| Cutulache | XOR Starter | 10 | |
| cryptic_angelina | XOR Starter | 10 | |
| 1502dthw | Transparency | 50 | |
| ciw | Bytes and Big Integers | 10 | |
| DxT3r | Structure of AES | 15 | |
| foxkids33 | XOR Properties | 15 | |
| tanis3050 | Chinese Remainder Theorem | 40 | |
| cryptic_angelina | Bytes and Big Integers | 10 | |
| ciw | Base64 | 10 | |
| rfmph | Deriving Symmetric Keys | 40 | |
| Cutulache | Bytes and Big Integers | 10 | |
| welder | Passwords as Keys | 50 |
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