| Date | User | Challenge | Score |
| ermadi | Modular Arithmetic 2 | 20 | |
| CryptoSteppe17 | Hex | 5 | |
| KintaZi | Modular Inverting | 25 | |
| ermadi | Modular Arithmetic 1 | 20 | |
| CryptoSteppe17 | ASCII | 5 | |
| ermadi | Extended GCD | 20 | |
| Ablayhan9900 | Oh SNAP | 120 | |
| hackerd | XOR Properties | 15 | |
| Ablayhan9900 | Everything is Still Big | 100 | |
| KoKoshKo | Oh SNAP | 120 | |
| ermadi | Greatest Common Divisor | 15 | |
| Ablayhan9900 | Dancing Queen | 120 | |
| liuneng25 | You either know, XOR you don't | 30 | |
| Ablayhan9900 | Stream of Consciousness | 80 | |
| quangntenemy | Digestive | 60 | |
| KoKoshKo | Dancing Queen | 120 | |
| Amirlan | Finding Flags | 2 | |
| KoKoshKo | Stream of Consciousness | 80 | |
| arsany | Great Snakes | 3 | |
| TyLion | Monoprime | 30 | |
| erdan | Privacy-Enhanced Mail? | 25 | |
| gasmer | Gram Schmidt | 30 | |
| Aarogant | XOR Starter | 10 | |
| arsany | Finding Flags | 2 | |
| hoomishalom | Quadratic Residues | 25 | |
| KoKoshKo | Bringing It All Together | 50 | |
| TyLion | Factoring | 15 | |
| 21beca | Encoding Challenge | 40 | |
| 4a4945474a4e4955 | ASCII | 5 | |
| sasvi | Modular Square Root | 35 | |
| fentaohe | Base64 | 10 | |
| lizsikuku | You either know, XOR you don't | 30 | |
| Honoured_One | Salty | 20 | |
| Aarogant | Bytes and Big Integers | 10 | |
| jonnytang | Symmetry | 50 | |
| hoomishalom | Modular Inverting | 25 | |
| fentaohe | Hex | 5 | |
| liuneng25 | Favourite byte | 20 | |
| hoomishalom | Extended GCD | 20 | |
| jonnytang | ECB Oracle | 60 | |
| Ablayhan9900 | Crossed Wires | 100 | |
| gasmer | Size and Basis | 15 | |
| 21beca | Bytes and Big Integers | 10 | |
| hoomishalom | Greatest Common Divisor | 15 | |
| hoomishalom | Modular Arithmetic 2 | 20 | |
| NMH_Asin | Share (HITCON CTF) | 0 | |
| hoomishalom | Modular Arithmetic 1 | 20 | |
| rush_i | ECB Oracle | 60 | |
| Ablayhan9900 | Everything is Big | 70 | |
| TyLion | RSA Signatures | 25 |
You are now level Current level