| Date | User | Challenge | Score |
| jonnytang | Euler's Totient | 20 | |
| KrunkerIO | Chinese Remainder Theorem | 40 | |
| jonnytang | Public Keys | 15 | |
| nc4 | Favourite byte | 20 | |
| spartan8806 | RSA vs RNG | 150 | |
| spartan8806 | Lo-Hi Card Game | 120 | |
| mileybis21 | XOR Starter | 10 | |
| nc4 | XOR Properties | 15 | |
| Khalio | Great Snakes | 3 | |
| Hacky_546 | Finding Flags | 2 | |
| GaboEscobar23 | You either know, XOR you don't | 30 | |
| Khalio | Finding Flags | 2 | |
| GojiLeSharpei | You either know, XOR you don't | 30 | |
| NayelyAyol | Modular Arithmetic 2 | 20 | |
| nc4 | XOR Starter | 10 | |
| Shyamama | XOR Starter | 10 | |
| GojiLeSharpei | Favourite byte | 20 | |
| NayelyAyol | Modular Arithmetic 1 | 20 | |
| mileybis21 | Bytes and Big Integers | 10 | |
| GojiLeSharpei | XOR Properties | 15 | |
| Namunamu | Collider | 50 | |
| GaboEscobar23 | Favourite byte | 20 | |
| GojiLeSharpei | XOR Starter | 10 | |
| spartan8806 | Bruce Schneier's Password: Part 2 | 250 | |
| Names3tma | Lazy CBC | 60 | |
| GojiLeSharpei | Bytes and Big Integers | 10 | |
| GaboEscobar23 | XOR Properties | 15 | |
| NayelyAyol | Extended GCD | 20 | |
| GojiLeSharpei | Base64 | 10 | |
| GojiLeSharpei | Hex | 5 | |
| KrunkerIO | Modular Square Root | 35 | |
| smugglarn | Passwords as Keys | 50 | |
| morpheus15 | The j-invariant | 20 | |
| Tabaxi3K | The Good, The Pad, The Ugly | 100 | |
| NicolasCh | Modular Binomials | 80 | |
| NicolasCh | Adrien's Signs | 80 | |
| morpheus15 | Introduction to Isogenies | 10 | |
| NicolasCh | Chinese Remainder Theorem | 40 | |
| smugglarn | Modes of Operation Starter | 15 | |
| Shyamama | Bytes and Big Integers | 10 | |
| sdigs | Logon Zero | 80 | |
| NicolasCh | Modular Square Root | 35 | |
| NicolasCh | Legendre Symbol | 35 | |
| NicolasCh | Quadratic Residues | 25 | |
| NicolasCh | Modular Inverting | 25 | |
| NicolasCh | Modular Arithmetic 2 | 20 | |
| NicolasCh | Modular Arithmetic 1 | 20 | |
| NicolasCh | Extended GCD | 20 | |
| NicolasCh | Greatest Common Divisor | 15 | |
| caledt | Generators of Groups | 20 |
You are now level Current level