| Date | User | Challenge | Score |
| readycyr | Hex | 5 | |
| SypherZ | Bytes and Big Integers | 10 | |
| vlengntng | Base64 | 10 | |
| DuckMaster | Flipping Cookie | 60 | |
| vlengntng | Hex | 5 | |
| CyGeek | XOR Starter | 10 | |
| That11thHarmonic | Breaking SIDH | 250 | |
| Karnx | Great Snakes | 3 | |
| Karnx | Finding Flags | 2 | |
| vlengntng | ASCII | 5 | |
| nurminen | Hamiltonicity 2 | 175 | |
| nurminen | Hamiltonicity 2 (CryptoHack) | 0 | |
| swViking | Modular Square Root | 35 | |
| swViking | Legendre Symbol | 35 | |
| swViking | Chinese Remainder Theorem | 40 | |
| swViking | Quadratic Residues | 25 | |
| Metrickson | Background Reading | 5 | |
| TechnoVolt | ASCII | 5 | |
| Redender64 | Composite Isogenies | 60 | |
| vlengntng | Great Snakes | 3 | |
| toaru_k | Private Keys | 20 | |
| shayklein | Base64 | 10 | |
| TechnoVolt | Great Snakes | 3 | |
| vlengntng | Finding Flags | 2 | |
| LacMyst | Favourite byte | 20 | |
| toaru_k | Euler's Totient | 20 | |
| ghigo | Diffusion through Permutation | 30 | |
| T4QI | Unencryptable | 125 | |
| toaru_k | Public Keys | 15 | |
| shayklein | Hex | 5 | |
| toaru_k | Modular Exponentiation | 10 | |
| Alessio03 | Great Snakes | 3 | |
| gasmer | XOR Starter | 10 | |
| CyGeek | Bytes and Big Integers | 10 | |
| Redender64 | Three Isogenies | 35 | |
| That11thHarmonic | SIDH Key Exchange | 80 | |
| Alessio03 | Finding Flags | 2 | |
| canoraks | Favourite byte | 20 | |
| CyGeek | Base64 | 10 | |
| TechnoVolt | Finding Flags | 2 | |
| SypherZ | Base64 | 10 | |
| CyGeek | Hex | 5 | |
| hack_use_math | Modes of Operation Starter | 15 | |
| KongBai | Euler's Totient | 20 | |
| ghigo | Confusion through Substitution | 25 | |
| hyperegg | XOR Starter | 10 | |
| CyGeek | ASCII | 5 | |
| mingi1178 | Hex | 5 | |
| LacMyst | XOR Properties | 15 | |
| mingi1178 | ASCII | 5 |
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