| Date | User | Challenge | Score |
| C15C01337_lite | Inferius Prime | 30 | |
| mhphamvu | Great Snakes | 3 | |
| 0xBanuchichak | Greatest Common Divisor | 15 | |
| HappRash | Square Eyes | 35 | |
| TonyNo | Finding Flags | 2 | |
| Diego120 | Modular Exponentiation | 10 | |
| 0xBanuchichak | You either know, XOR you don't | 30 | |
| 0xBanuchichak | Favourite byte | 20 | |
| selen_klblyva | Greatest Common Divisor | 15 | |
| selen_klblyva | You either know, XOR you don't | 30 | |
| selen_klblyva | Favourite byte | 20 | |
| 0xBanuchichak | XOR Properties | 15 | |
| 0xBanuchichak | XOR Starter | 10 | |
| selen_klblyva | XOR Properties | 15 | |
| selen_klblyva | XOR Starter | 10 | |
| C15C01337_lite | Factoring | 15 | |
| selen_klblyva | Bytes and Big Integers | 10 | |
| jackoha | Bit by Bit | 100 | |
| axinjector | Base64 | 10 | |
| bakr | Hex | 5 | |
| axinjector | Transparency | 50 | |
| selen_klblyva | Base64 | 10 | |
| axinjector | SSH Keys | 35 | |
| 25520158 | Transparency | 50 | |
| selen_klblyva | Hex | 5 | |
| axinjector | Privacy-Enhanced Mail? | 25 | |
| flower2 | Greatest Common Divisor | 15 | |
| axinjector | Modular Inverting | 25 | |
| axinjector | Modular Arithmetic 2 | 20 | |
| axinjector | Modular Arithmetic 1 | 20 | |
| axinjector | Extended GCD | 20 | |
| axinjector | Greatest Common Divisor | 15 | |
| axinjector | Lemur XOR | 40 | |
| C15C01337_lite | RSA Signatures | 25 | |
| axinjector | You either know, XOR you don't | 30 | |
| bownight022 | XOR Starter | 10 | |
| axinjector | Favourite byte | 20 | |
| axinjector | XOR Starter | 10 | |
| axinjector | XOR Properties | 15 | |
| axinjector | Encoding Challenge | 40 | |
| selen_klblyva | ASCII | 5 | |
| axinjector | Bytes and Big Integers | 10 | |
| bownight022 | Bytes and Big Integers | 10 | |
| axinjector | Hex | 5 | |
| flower2 | RSA Signatures | 25 | |
| axinjector | ASCII | 5 | |
| selen_klblyva | Great Snakes | 3 | |
| Gondowt | Favourite byte | 20 | |
| axinjector | Finding Flags | 2 | |
| axinjector | Network Attacks | 5 |
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