| Date | User | Challenge | Score |
| gecko | Greatest Common Divisor | 15 | |
| Cantoloupe | Base64 | 10 | |
| Mkx | Base64 | 10 | |
| gecko | You either know, XOR you don't | 30 | |
| Iruysky24 | Point Negation | 10 | |
| kurimochi | Adrien's Signs | 80 | |
| Iruysky24 | Background Reading | 5 | |
| swagR | Legendre Symbol | 35 | |
| Mkx | Hex | 5 | |
| Cupi | Favourite byte | 20 | |
| davide_rebuffo | Network Attacks | 5 | |
| 0x4A79D3V | Bytes and Big Integers | 10 | |
| LTaki | Everything is Big | 70 | |
| Iruysky24 | Public Keys | 15 | |
| Regnm0ln1 | Factoring | 15 | |
| Mkx | ASCII | 5 | |
| Iruysky24 | Modular Exponentiation | 10 | |
| nahsor | Modular Inverting | 25 | |
| nahsor | Modular Arithmetic 2 | 20 | |
| haemul | Extended GCD | 20 | |
| Mkx | Great Snakes | 3 | |
| stasuke | Greatest Common Divisor | 15 | |
| SongChao | Modular Arithmetic 1 | 20 | |
| SongChao | Extended GCD | 20 | |
| haemul | Greatest Common Divisor | 15 | |
| Mkx | Finding Flags | 2 | |
| SongChao | Greatest Common Divisor | 15 | |
| Addamag | You either know, XOR you don't | 30 | |
| EmmanuelGoldberg | Manyprime | 40 | |
| swagR | Quadratic Residues | 25 | |
| haemul | Lemur XOR | 40 | |
| RSP | Hex | 5 | |
| Addamag | Favourite byte | 20 | |
| Addamag | XOR Properties | 15 | |
| cryptokiwi | Modulus Inutilis | 50 | |
| oiu890 | Logon Zero | 80 | |
| kurimochi | Chinese Remainder Theorem | 40 | |
| ioi_ico | Modular Binomials | 80 | |
| EmmanuelGoldberg | Square Eyes | 35 | |
| ch4tbl4nc | Finding Flags | 2 | |
| ngynmq | Smooth Criminal | 60 | |
| haemul | You either know, XOR you don't | 30 | |
| LeeWangWy | Gaussian Reduction | 50 | |
| haemul | Favourite byte | 20 | |
| 0x4A79D3V | Base64 | 10 | |
| sma11pi9 | RSA or HMAC? | 35 | |
| haemul | XOR Properties | 15 | |
| ioi_ico | Adrien's Signs | 80 | |
| vv | XOR Starter | 10 | |
| nvkiero | Extended GCD | 20 |
You are now level Current level