The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 days. Why not try and solve them ahead of time?
Farey Sequence in Python in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 161st denkyuu1 520 127 20ms 7 Feb 2026 162nd 4ndyJ 🇬🇧 516 128 12ms 29 Feb 2024 163rd HumanoidCPU 512 129 20ms 5 Jun 2024 163rd CutSandstone 512 129 11ms 19 Jul 2024 163rd wh3n3v3r 🇨🇿 512 129 24ms 18 Nov 2024 163rd Andrey2001 512 129 19ms 1 Feb 2026 163rd tomh1012 512 129 14ms 19 Feb 2026 168th addmai 508 130 20ms 30 Jul 2025 168th Googolplexo 🇷🇺 508 130 19ms 44 hours ago 170th bjornmartensson 504 131 80ms 11 Dec 2023 170th Mabeloid 🇳🇴 504 131 20ms 11 Sep 2024 172nd michelebastione 🇮🇹 500 132 24ms 23 Dec 2023 172nd CatsAreFluffy 500 132 28ms 31 Jan 2024 172nd FranklinJiaChen 500 132 26ms 4 Aug 2024 175th solisolu 496 133 11ms 5 Dec 2025 176th 40fied4t 489 135 12ms 23 Jan 2026 177th kevinnaviapaiva 485 136 11ms 46 hours ago 178th f-tucker 482 137 33ms 24 May 2024 178th Jaydosu 482 137 14ms 26 Jun 2024 178th mbittner20 482 137 21ms 13 Apr 2025 181st Emutis 🇱🇹 478 138 17ms 4 Aug 2025 182nd AtengChen 471 140 13ms 14 Aug 2024 183rd ridingqwerty 🇺🇸 465 142 19ms 28 Dec 2023 183rd CyberTapir 465 142 11ms 5 Sep 2024 183rd wobblybits 465 142 21ms 20 Aug 2025 183rd cthierfelder 🇲🇨 465 142 21ms 14 Nov 2025 187th sciencejiho 462 143 21ms 18 Oct 2024 187th Andrey135296 462 143 12ms 26 Oct 2024 189th sultan 455 145 12ms 3 Mar 2024 189th alexeldridge 455 145 19ms 12 Aug 2024 189th ComputerKWasTaken 🇺🇸 455 145 23ms 23 Apr 2025 192nd amollberg 🇸🇪 452 146 20ms 8 Jan 2024 193rd Alban-Boissard 443 149 47ms 14 Jun 2025 193rd 77Tigers 443 149 11ms 13 Jan 2026 195th jfallon1997 431 153 21ms 3 Jun 2024 196th AzroyAr 423 156 24ms 28 Dec 2023 197th JunkIce 420 157 11ms 3 Dec 2024 198th adoxography 410 161 17ms 22 Oct 2024 199th gigaprofisi 🇺🇸 407 162 21ms 24 Jun 2025 200th mrmena 🇦🇺 388 170 11ms 19 Mar 2024 201st qwjhvbxi 379 174 12ms 6 Feb 2024 202nd Pale-Vessel 371 178 11ms 7 Mar 2024 203rd CodyKlingler 369 179 12ms 20 Jan 2025 204th JesseNoEyes 🇺🇸 367 180 13ms 24 Nov 2024 205th WillowWispy 363 182 11ms 14 Mar 2025 206th ItsEthanDev 357 185 12ms 24 Dec 2023 207th jtaxen 346 191 34ms 7 May 2024 208th jameswmccarty 338 195 18ms 25 Jan 2026 209th neonchickens 328 201 12ms 22 Jan 2025 210th azure-blondon 327 202 23ms 10 Dec 2023 211th galloj 🇨🇿 301 219 43ms 24 Apr 2024 212th robin-scragg 297 222 77ms 21 Sep 2025 213th TheZwierzLF 🇵🇱 288 229 53ms 30 May 2025 214th Unknownuserfrommars 284 232 21ms 22 Nov 2024 215th RaBa21 🇭🇺 270 244 21ms 22 Jun 2024 216th aksyristos 265 249 63ms 4 Sep 2024 217th muser-logiccpu 🇺🇦 257 257 13ms 19 Aug 2025 218th AidanWalter 242 273 10ms 3 Jan 2025 219th cingulataluke 188 352 22ms 3 Jun 2024 220th Zhenyu-Bo 174 380 12ms 1 Aug 2025 221st kurkale6ka 15 4,366 10ms 3 Jan 2024 221st returnitynet 15 4,366 12ms 3 Jan 2025 221st madeforlosers 15 4,366 11ms 9 May 2025 224th zt14427 13 5,136 12ms 25 Dec 2023 225th KatieLG-Transpiler 🇬🇧 13 5,140 11ms 1 Jan 2024 First Prev 161–225 of 225
