| Date | User | Challenge | Score |
| dragon99 | Extended GCD | 20 | |
| ALHALA | Base64 | 10 | |
| ZiggyNorton | Quadratic Residues | 25 | |
| yawnfate2442 | Hex | 5 | |
| KingOfRlyeh | Modular Arithmetic 2 | 20 | |
| ALHALA | Hex | 5 | |
| urinZugzwang | Finding Flags | 2 | |
| ASK627 | Finding Flags | 2 | |
| dragon99 | Greatest Common Divisor | 15 | |
| ALHALA | ASCII | 5 | |
| ZiggyNorton | Modular Inverting | 25 | |
| superhaka | Base64 | 10 | |
| Codru | Modes of Operation Starter | 15 | |
| dragon99 | You either know, XOR you don't | 30 | |
| ZiggyNorton | Modular Arithmetic 2 | 20 | |
| DinoGun | Round Keys | 20 | |
| oel12021 | Hex | 5 | |
| ZiggyNorton | Modular Arithmetic 1 | 20 | |
| lalala2342465 | Bytes and Big Integers | 10 | |
| dark2968 | XOR Starter | 10 | |
| dark2968 | Bytes and Big Integers | 10 | |
| superhaka | ASCII | 5 | |
| dark2968 | Base64 | 10 | |
| dark2968 | Hex | 5 | |
| dark2968 | ASCII | 5 | |
| test1337 | ECB CBC WTF | 55 | |
| dark2968 | Great Snakes | 3 | |
| dark2968 | Finding Flags | 2 | |
| superhaka | Hex | 5 | |
| Globules | You either know, XOR you don't | 30 | |
| JGaspar | Adrien's Signs | 80 | |
| Globules | Favourite byte | 20 | |
| kanika_069 | Base64 | 10 | |
| dainghiajustiin | Legendre Symbol | 35 | |
| kanika_069 | Hex | 5 | |
| kanika_069 | ASCII | 5 | |
| kanika_069 | Great Snakes | 3 | |
| kanika_069 | Finding Flags | 2 | |
| Mai47 | Triple DES | 60 | |
| methodtoss | Base64 | 10 | |
| champinion | Network Attacks | 5 | |
| Globules | XOR Properties | 15 | |
| methodtoss | Hex | 5 | |
| dainghiajustiin | Quadratic Residues | 25 | |
| feynhat | Computing Public Values | 25 | |
| Qingtong | XOR Starter | 10 | |
| archex | Point Addition | 30 | |
| dainghiajustiin | Modular Inverting | 25 | |
| wumkan | Modular Arithmetic 2 | 20 | |
| methodtoss | ASCII | 5 |
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