| Date | User | Challenge | Score |
| crypto_sis | Modular Arithmetic 1 | 20 | |
| d4pr0 | Oracular Spectacular | 150 | |
| d4sh0326 | Modular Square Root | 35 | |
| crypto_sis | Extended GCD | 20 | |
| kinggauss | Finding Flags | 2 | |
| emanu93 | Monoprime | 30 | |
| lewalker | You either know, XOR you don't | 30 | |
| d4sh0326 | Legendre Symbol | 35 | |
| crypto_sis | Greatest Common Divisor | 15 | |
| lewalker | Favourite byte | 20 | |
| spaceman_spiff | You either know, XOR you don't | 30 | |
| Lifer | Great Snakes | 3 | |
| ubergum | Base64 | 10 | |
| yaef | Network Attacks | 5 | |
| emanu93 | Factoring | 15 | |
| ubergum | Hex | 5 | |
| tdz | Finding Flags | 2 | |
| lewalker | XOR Properties | 15 | |
| ubergum | ASCII | 5 | |
| ubergum | Great Snakes | 3 | |
| ubergum | Finding Flags | 2 | |
| yaef | Base64 | 10 | |
| ishaanharry | Resisting Bruteforce | 10 | |
| yaef | Hex | 5 | |
| ishaanharry | Keyed Permutations | 5 | |
| FLU | Adrien's Signs | 80 | |
| yaef | ASCII | 5 | |
| gbell27 | Greatest Common Divisor | 15 | |
| yaef | Great Snakes | 3 | |
| JacobLu3141 | Modes of Operation Starter | 15 | |
| pin3apple07 | A Twisted Mind | 80 | |
| IgnAto | XOR Starter | 10 | |
| jeydpbb | Broken RSA | 100 | |
| Ariane29theGOAT | Greatest Common Divisor | 15 | |
| JacobLu3141 | Bringing It All Together | 50 | |
| FLU | Chinese Remainder Theorem | 40 | |
| yaef | Finding Flags | 2 | |
| fucla | Adrien's Signs | 80 | |
| InspectorPing | Great Snakes | 3 | |
| Fisher57 | ASCII | 5 | |
| Dagger7398 | XOR Properties | 15 | |
| jeydpbb | CERTainly not | 30 | |
| InspectorPing | Finding Flags | 2 | |
| Fisher57 | Great Snakes | 3 | |
| aj1002 | Greatest Common Divisor | 15 | |
| Fisher57 | Finding Flags | 2 | |
| jeydpbb | Privacy-Enhanced Mail? | 25 | |
| shmdotexe | Bytes and Big Integers | 10 | |
| emanu93 | RSA Signatures | 25 | |
| Dagger7398 | XOR Starter | 10 |
You are now level Current level