| Date | User | Challenge | Score |
| momistorm | Greatest Common Divisor | 15 | |
| Thaimeo2006 | SSH Keys | 35 | |
| Felix_D | Transparency | 50 | |
| NicoFchs | Resisting Bruteforce | 10 | |
| MoncefBexx | Favourite byte | 20 | |
| jkll52 | Modular Arithmetic 1 | 20 | |
| wrish | Hex | 5 | |
| Letschi000 | Greatest Common Divisor | 15 | |
| rokhayaa88 | Bytes and Big Integers | 10 | |
| AntiPro | Greatest Common Divisor | 15 | |
| deadlock83 | Base64 | 10 | |
| MoncefBexx | XOR Properties | 15 | |
| NicoFchs | Keyed Permutations | 5 | |
| deadlock83 | Hex | 5 | |
| TomatenMark23 | Great Snakes | 3 | |
| chris_ortba | Extended GCD | 20 | |
| deadlock83 | ASCII | 5 | |
| wrish | ASCII | 5 | |
| TerezaGr_p22037 | Base64 | 10 | |
| Felix_D | SSH Keys | 35 | |
| deadlock83 | Great Snakes | 3 | |
| Felix_D | CERTainly not | 30 | |
| deadlock83 | Finding Flags | 2 | |
| Felix_D | Privacy-Enhanced Mail? | 25 | |
| wrish | Great Snakes | 3 | |
| NicoFchs | Greatest Common Divisor | 15 | |
| TypNull07 | Extended GCD | 20 | |
| Felix_D | Modular Inverting | 25 | |
| Edu201224 | Great Snakes | 3 | |
| tremonvent | Network Attacks | 5 | |
| Felix_D | Modular Arithmetic 2 | 20 | |
| Felix_D | Modular Arithmetic 1 | 20 | |
| Felix_D | Extended GCD | 20 | |
| Felix_D | Greatest Common Divisor | 15 | |
| Felix_D | Lemur XOR | 40 | |
| Baeco | Breaking SIDH | 250 | |
| wrish | Finding Flags | 2 | |
| Felix_D | Encoding Challenge | 40 | |
| NicoFchs | You either know, XOR you don't | 30 | |
| medb | MDFlag | 125 | |
| TerezaGr_p22037 | Hex | 5 | |
| chris_ortba | Greatest Common Divisor | 15 | |
| Noassl | You either know, XOR you don't | 30 | |
| TypNull07 | Greatest Common Divisor | 15 | |
| momistorm | You either know, XOR you don't | 30 | |
| AntiPro | You either know, XOR you don't | 30 | |
| emowraith | Confusion through Substitution | 25 | |
| thebigdylan | diffecient (SekaiCTF) | 0 | |
| Yude0418 | XOR Properties | 15 | |
| Hambr | LWE Low Bits Message | 20 |
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