| Date | User | Challenge | Rating | |
| FluffandFlames | Greatest Common Divisor | 0 | ||
| gokulavasan | Quadratic Residues | 0 | ||
| TeraP | Legendre Symbol | 0 | ||
| TeraP | Quadratic Residues | 0 | ||
| KOREONE | Common Ground | 0 | ||
| 0xOuss | Modular Arithmetic 1 | 0 | ||
| jotaefepinho | Common Ground | 2 | ||
| SleepyBanana | Long Story Short | 0 | ||
| SleepyBanana | Seventy-Two | 0 | ||
| SleepyBanana | Bad Temper | 0 | ||
| lydxn | Rhetorical Oracle 2 | 1 | ||
| saro | Common Ground | 0 | ||
| gokulavasan | Modular Arithmetic 1 | 0 | ||
| Showkara | An Exceptional Twisted Mind | 0 | ||
| ConnorM | Common Ground | 1 | ||
| gokulavasan | Finding Flags | 0 | ||
| PhantomKey | Base64 | 2 | ||
| 0xOuss | Extended GCD | 0 | ||
| OutOfTheWell | Lazy CBC | 0 | ||
| alogos | Confusion through Substitution | 0 | ||
| duckpancakes | Oracular Spectacular | 0 | ||
| TeraP | Modular Inverting | 0 | ||
| pain1404 | You either know, XOR you don't | 0 | ||
| TeraP | Modular Arithmetic 2 | 0 | ||
| TeraP | Modular Arithmetic 1 | 0 |
| Rank | User | Challenge | Rating | |
| #1 | medvedisko | XOR Properties | 360 | |
| #2 | bigtuple | Favourite byte | 220 | |
| #3 | Robin_Jadoul | Adrien's Signs | 210 | |
| #4 | D00Movenok | You either know, XOR you don't | 128 | |
| #5 | Robin_Jadoul | Transparency | 117 | |
| #6 | amadeus | Quadratic Residues | 116 | |
| #7 | thanoskoutr | Modular Inverting | 114 | |
| #8 | Flecart | Legendre Symbol | 113 | |
| #9 | Drago | Crossed Wires | 111 | |
| #10 | obormot | Greatest Common Divisor | 110 | |
| #11 | exp101t | Modular Binomials | 105 | |
| #12 | StormXploit | Favourite byte | 93 | |
| #13 | Robin_Jadoul | Encoding Challenge | 90 | |
| #14 | Robin_Jadoul | Structure of AES | 89 | |
| #15 | fecell | Extended GCD | 85 | |
| #16 | ddddavidee | Successive Powers | 78 | |
| #17 | 0xEmperor | XOR Properties | 70 | |
| #18 | Hon | Modular Inverting | 64 | |
| #19 | aloof | Exceptional Curves | 62 | |
| #20 | GingerCarrot | Extended GCD | 59 | |
| #21 | Daneallen | Lemur XOR | 58 | |
| #22 | boge | Favourite byte | 57 | |
| #23 | aloof | Everything is Still Big | 56 | |
| #24 | aloof | RSA Backdoor Viability | 55 | |
| #25 | shoaloak | Lemur XOR | 54 | |
| #26 | Retr0id | ECB Oracle | 53 | |
| #27 | zademn | Fast Primes | 50 | |
| #28 | shaloo | Greatest Common Divisor | 49 | |
| #29 | Drago | Adrien's Signs | 48 | |
| #30 | Drago | Jack's Birthday Hash | 48 | |
| #31 | p4b | Cofactor Cofantasy | 46 | |
| #32 | obormot | Modular Arithmetic 1 | 46 | |
| #33 | T0t0r0 | Parameter Injection | 44 | |
| #34 | Utaha | Roll your Own | 43 | |
| #35 | Robin_Jadoul | Modular Binomials | 43 | |
| #36 | aloof | Moving Problems | 42 | |
| #37 | aloof | Ellipse Curve Cryptography | 41 | |
| #38 | R4GN4R | Privacy-Enhanced Mail? | 41 | |
| #39 | thanoskoutr | Modular Arithmetic 2 | 41 | |
| #40 | Darumaseye | Generators of Groups | 40 | |
| #41 | Likkrid | Modular Square Root | 39 | |
| #42 | glgspg | Round Keys | 38 | |
| #43 | thanoskoutr | Modular Arithmetic 1 | 38 | |
| #44 | ctfhacker | Modular Square Root | 37 | |
| #45 | Scalpel | Private Keys | 37 | |
| #46 | aschanna123 | Backpack Cryptography | 36 | |
| #47 | josephs | Cofactor Cofantasy | 35 | |
| #48 | trillian | Smooth Criminal | 35 | |
| #49 | trillian | Vote for Pedro | 34 | |
| #50 | Drago | Monoprime | 34 |
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