| Date | User | Challenge | Score |
| mecji | Hex | 5 | |
| Device420 | Quadratic Residues | 25 | |
| Device420 | Great Snakes | 3 | |
| daethyra | Favourite byte | 20 | |
| abdelhak | Privacy-Enhanced Mail? | 25 | |
| 3nz0 | XOR Properties | 15 | |
| BlackBach | ZKP Introduction | 5 | |
| daethyra | XOR Properties | 15 | |
| manolosf | Finding Flags | 2 | |
| BlackBach | Modular Binomials | 80 | |
| BlackBach | Adrien's Signs | 80 | |
| P0WER | Encoding Challenge | 40 | |
| BlackBach | Chinese Remainder Theorem | 40 | |
| 3nz0 | XOR Starter | 10 | |
| BlackBach | Modular Square Root | 35 | |
| Z10UD1 | Endless Emails | 150 | |
| BlackBach | Legendre Symbol | 35 | |
| ventie | Encoding Challenge | 40 | |
| BlackBach | Quadratic Residues | 25 | |
| Z10UD1 | Everything is Still Big | 100 | |
| BlackBach | Modular Inverting | 25 | |
| BlackBach | Modular Arithmetic 2 | 20 | |
| BlackBach | Modular Arithmetic 1 | 20 | |
| Z10UD1 | Crossed Wires | 100 | |
| dman | Modes of Operation Starter | 15 | |
| BlackBach | Extended GCD | 20 | |
| mauwyh | Keyed Permutations | 5 | |
| numberenjoyer | Base64 | 10 | |
| MrMazury | ASCII | 5 | |
| dman | Bringing It All Together | 50 | |
| MrMazury | Great Snakes | 3 | |
| Z10UD1 | Everything is Big | 70 | |
| Hamoud | Bytes and Big Integers | 10 | |
| MrMazury | Finding Flags | 2 | |
| Cano_il_Marsi | Background Reading | 5 | |
| demr | Modular Binomials | 80 | |
| Cano_il_Marsi | From Private to Public Key LWE | 25 | |
| cryptohack137 | Bytes and Big Integers | 10 | |
| Cano_il_Marsi | LWE High Bits Message | 15 | |
| Hamoud | Base64 | 10 | |
| jscornelius | Extended GCD | 20 | |
| b1b00www | Moving Problems | 150 | |
| Hamoud | Hex | 5 | |
| creep3r | Quadratic Residues | 25 | |
| jscornelius | Greatest Common Divisor | 15 | |
| astelor | Noise Free | 40 | |
| iwalu | Favourite byte | 20 | |
| Cano_il_Marsi | LWE Intro | 10 | |
| b1b00www | Elliptic Nodes | 150 | |
| jscornelius | You either know, XOR you don't | 30 |
You are now level Current level