| Date | User | Challenge | Score |
| Zephorzzz | Extended GCD | 20 | |
| REZNET | Base64 | 10 | |
| The_Duke | Modular Arithmetic 2 | 20 | |
| Lyxchee | Chinese Remainder Theorem | 40 | |
| Zephorzzz | Greatest Common Divisor | 15 | |
| REZNET | Hex | 5 | |
| skylight | Favourite byte | 20 | |
| The_Duke | Modular Arithmetic 1 | 20 | |
| The_Duke | Extended GCD | 20 | |
| flouxtine | Efficient Exchange | 50 | |
| PrimusPilusC | Bytes and Big Integers | 10 | |
| REZNET | ASCII | 5 | |
| kl3in | XOR Starter | 10 | |
| The_Duke | Greatest Common Divisor | 15 | |
| Onryo | Finding Flags | 2 | |
| sna_huy | Base64 | 10 | |
| 0xWhisper | ASCII | 5 | |
| 0xWhisper | Great Snakes | 3 | |
| kl3in | Bytes and Big Integers | 10 | |
| 0xWhisper | Finding Flags | 2 | |
| Zephorzzz | Base64 | 10 | |
| The_Duke | You either know, XOR you don't | 30 | |
| Zephorzzz | Hex | 5 | |
| REZNET | Great Snakes | 3 | |
| kl3in | Base64 | 10 | |
| REZNET | Finding Flags | 2 | |
| The_Duke | Favourite byte | 20 | |
| Avicena | Hex | 5 | |
| The_Duke | XOR Properties | 15 | |
| Zephorzzz | ASCII | 5 | |
| sna_huy | Hex | 5 | |
| williamNah | Favourite byte | 20 | |
| sna_huy | ASCII | 5 | |
| daazle | ASCII | 5 | |
| williamNah | XOR Properties | 15 | |
| PrimusPilusC | Base64 | 10 | |
| daazle | Great Snakes | 3 | |
| Pavia127 | Everything is Big | 70 | |
| DinoCodeAdvisor | Everything is Big | 70 | |
| alexdzul | Export-grade | 100 | |
| daazle | Finding Flags | 2 | |
| Pavia127 | Salty | 20 | |
| sna_huy | Great Snakes | 3 | |
| LuisARS | Salty | 20 | |
| sna_huy | Finding Flags | 2 | |
| alexdzul | Parameter Injection | 60 | |
| PrimusPilusC | Hex | 5 | |
| ScottRussel | Bytes and Big Integers | 10 | |
| alexdzul | Deriving Symmetric Keys | 40 | |
| Pavia127 | Square Eyes | 35 |
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