| Date | User | Challenge | Score |
| Evira | Confusion through Substitution | 25 | |
| kleiosyrigou | Point Negation | 10 | |
| marpap19 | Monoprime | 30 | |
| habi | Chinese Remainder Theorem | 40 | |
| BaBYBu11 | Collider | 50 | |
| Lukarius | ASCII | 5 | |
| Lukarius | Great Snakes | 3 | |
| TeoKech | Modular Inverting | 25 | |
| hayzer | Modes of Operation Starter | 15 | |
| chhhhhhhhh01 | Modular Inverting | 25 | |
| racon | Pad Thai | 80 | |
| chhhhhhhhh01 | Modular Arithmetic 2 | 20 | |
| chhhhhhhhh01 | Modular Arithmetic 1 | 20 | |
| chhhhhhhhh01 | Extended GCD | 20 | |
| osihlovec | OR Proof | 75 | |
| osihlovec | OR Proof (CryptoHack) | 0 | |
| daxl | Finding Flags | 2 | |
| ub_krypto_25_14 | You either know, XOR you don't | 30 | |
| TeoKech | Modular Arithmetic 2 | 20 | |
| semisweetdude | Modular Arithmetic 2 | 20 | |
| spork | Bytes and Big Integers | 10 | |
| 0xLunar292 | Point Negation | 10 | |
| semisweetdude | Modular Arithmetic 1 | 20 | |
| ub_krypto_25_14 | Lemur XOR | 40 | |
| LashaG | ECB CBC WTF | 55 | |
| Feti | Factoring | 15 | |
| kozibozi | You either know, XOR you don't | 30 | |
| AeroSol | Toshi's Treasure | 150 | |
| eirene | Chinese Remainder Theorem | 40 | |
| foidphobic | Base64 | 10 | |
| foidphobic | Hex | 5 | |
| cannonbolt1 | Favourite byte | 20 | |
| P19213 | Keyed Permutations | 5 | |
| falchion | Greatest Common Divisor | 15 | |
| P19213 | Successive Powers | 60 | |
| Feti | RSA Signatures | 25 | |
| W1nd5h13ldV1p3r | Modulus Inutilis | 50 | |
| TeoKech | Modular Arithmetic 1 | 20 | |
| ub_krypto_25_14 | Favourite byte | 20 | |
| eyadKing | Resisting Bruteforce | 10 | |
| guilty | Favourite byte | 20 | |
| foidphobic | ASCII | 5 | |
| P19213 | Chinese Remainder Theorem | 40 | |
| P19213 | Modular Square Root | 35 | |
| Gusm | Bytes and Big Integers | 10 | |
| falchion | You either know, XOR you don't | 30 | |
| foidphobic | Great Snakes | 3 | |
| eyadKing | Keyed Permutations | 5 | |
| foidphobic | Finding Flags | 2 | |
| Woodsman | Greatest Common Divisor | 15 |
You are now level Current level