| Date | User | Challenge | Score |
| hack011 | ASCII | 5 | |
| pmk1d | Modular Square Root | 35 | |
| Hugof01 | Modular Inverting | 25 | |
| Hugof01 | Modular Arithmetic 2 | 20 | |
| flo314314 | Greatest Common Divisor | 15 | |
| r4k00n | XOR Starter | 10 | |
| memoflora | Base64 | 10 | |
| Hugof01 | Modular Arithmetic 1 | 20 | |
| memoflora | Hex | 5 | |
| Hugof01 | Extended GCD | 20 | |
| PaulVogel | ASCII | 5 | |
| Hugof01 | Greatest Common Divisor | 15 | |
| memoflora | ASCII | 5 | |
| Hugof01 | Lemur XOR | 40 | |
| RAZEPLIER | XOR Starter | 10 | |
| PaulVogel | Great Snakes | 3 | |
| last_rite_3rd | You either know, XOR you don't | 30 | |
| PaulVogel | Finding Flags | 2 | |
| d3f4ult3rs | Great Snakes | 3 | |
| zeven | Confusion through Substitution | 25 | |
| last_rite_3rd | Favourite byte | 20 | |
| Kairo | Hex | 5 | |
| d3f4ult3rs | Finding Flags | 2 | |
| memoflora | Great Snakes | 3 | |
| memoflora | Finding Flags | 2 | |
| nurminen | An Exceptional Twisted Mind | 125 | |
| MrJLD | Additive | 70 | |
| r4k00n | Bytes and Big Integers | 10 | |
| ballser | Bytes and Big Integers | 10 | |
| last_rite_3rd | XOR Properties | 15 | |
| r4k00n | Base64 | 10 | |
| ballser | Base64 | 10 | |
| NguyenVangVanTie | Resisting Bruteforce | 10 | |
| last_rite_3rd | XOR Starter | 10 | |
| ballser | Hex | 5 | |
| NguyenVangVanTie | Keyed Permutations | 5 | |
| ballser | ASCII | 5 | |
| pmk1d | Legendre Symbol | 35 | |
| Kairo | ASCII | 5 | |
| Kairo | Great Snakes | 3 | |
| NguyenVangVanTie | Finding Flags | 2 | |
| Kairo | Finding Flags | 2 | |
| BERLiN_1 | Finding Flags | 2 | |
| Hugof01 | You either know, XOR you don't | 30 | |
| nurminen | A Twisted Mind | 80 | |
| noramvi | Prime and Prejudice | 200 | |
| tibinyte | Backpack Cryptography | 120 | |
| Hugof01 | Favourite byte | 20 | |
| Paradox624 | No Way JOSE | 20 | |
| RDWay | Greatest Common Divisor | 15 |
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