The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 5 days. Why not try and solve them ahead of time?
π in all languages 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 720th 52525rr 670 87 11ms 12 Jun 2025 720th lowlighter 670 87 12ms 21 Jan 2026 723rd btjones0 670 95 18ms 6 Dec 2021 723rd quimey 670 95 81ms 16 Mar 2023 725th m-tkach 🇺🇦 670 180 420ms 26 May 2022 725th MeWhenI 🇻🇦 670 180 70ms 21 May 2023 727th MeWhenI 🇻🇦 667 76 300ms 28 Jan 2023 728th olleicua 🇺🇸 666 61 48ms 13 Mar 2024 728th tatzyr 🇯🇵 666 61 46ms 26 Dec 2024 728th SirBogman 🇺🇸 666 61 44ms 29 Jan 2026 731st janbehrens 🇩🇪 666 181 443ms 15 May 2023 731st oceko 666 181 451ms 13 Feb 2024 733rd voytxt 🇨🇿 665 46 2,214ms 19 May 2022 734th Pimentero 🇷🇺 662 88 11ms 2 Apr 2021 734th jansekulowicz 662 88 12ms 8 May 2022 736th Bubbler-4 661 88 2,085ms 27 Jan 2022 737th DialFrost 🇸🇬 661 155 3ms 6 Sep 2024 738th ethanlally 660 174 394ms 11 days ago 739th stefangimmillaro 659 208 151ms 21 Oct 2023 740th MeWhenI 🇻🇦 658 200 4,207ms 3 Sep 2023 741st CaedenHarper 🇨🇦 657 223 384ms 20 Nov 2025 742nd LostSyntax21 🇬🇧 656 62 44ms 22 Aug 2024 742nd Lv0Sys 🇵🇱 656 62 48ms 5 Jun 2025 742nd blaztoma 🇱🇹 656 62 42ms 25 Dec 2025 742nd dokutan 656 62 52ms 25 Dec 2025 742nd Yewzir 🇧🇪 656 62 41ms 26 Dec 2025 742nd KatieLG 🇬🇧 656 62 47ms 27 Dec 2025 742nd SephQ 656 62 43ms 29 Dec 2025 749th MeWhenI 🇻🇦 656 183 51ms 17 Feb 2023 750th taklam 655 89 13ms 27 May 2020 750th xyangst 655 89 11ms 8 Oct 2024 750th gigaprofisi 🇺🇸 655 89 80ms 25 Jul 2025 753rd CatsAreFluffy 654 91 452ms 15 Jan 2024 754th prestosilver 🇺🇸 654 208 1,203ms 14 days ago 754th janAkali 🇷🇺 654 208 455ms 12 days ago 756th bendiscz 654 224 308ms 20 Apr 2020 757th emgordon154 652 105 47ms 10 Dec 2024 758th primo-ppcg 🇹🇭 652 176 509ms 13 Jul 2020 758th Lydxn 🇨🇦 652 176 579ms 28 Dec 2021 760th somebody1234 651 47 168ms 11 Dec 2018 761st AlephSquirrel 651 206 128ms 3 Aug 2023 762nd stefangimmillaro 650 218 137ms 6 Nov 2023 763rd m-tkach 🇺🇦 648 158 7ms 26 May 2022 763rd janbehrens 🇩🇪 648 158 7ms 15 May 2023 765th Andrey-Plotnikov 647 90 16ms 25 Jun 2025 766th aksyristos 645 63 43ms 3 Feb 2023 766th jmerle 🇳🇱 645 63 51ms 16 Feb 2023 766th m-tkach 🇺🇦 645 63 42ms 27 Dec 2025 766th RaBa21 🇭🇺 645 63 44ms 13 Feb 2026 770th cure-honey 🇯🇵 645 276 67ms 8 Jul 2021 771st MeWhenI 🇻🇦 643 76 722ms 1 Nov 2023 772nd stefangimmillaro 643 160 43ms 26 Apr 2025 773rd emgordon154 643 192 1,603ms 1 Jun 2025 774th emgordon154 643 208 3,428ms 7 Sep 2024 775th FlorianCassayre 🇫🇷 641 39 35ms 11 Sep 2023 776th SirBogman 🇺🇸 641 374 212ms 12 Jul 2023 777th gnlow 🇰🇷 640 91 11ms 14 Feb 2021 777th weliveinhell 🇭🇹 640 91 12ms 4 Oct 2023 777th mamamia5x 640 91 15ms 8 Mar 2024 780th rambox11 640 160 7ms 12 Mar 2019 781st DialFrost 🇸🇬 639 161 45ms 30 Apr 2025 782nd emgordon154 638 108 2,886ms 12 Jul 2025 783rd Aurel300 🇨🇭 638 222 153ms 21 Jul 2024 784th andersk 🇺🇸 637 48 2,011ms 4 Mar 2023 784th chubbc 637 48 164ms 30 Dec 2024 786th BREMAUCY 🇫🇷 637 161 435ms 29 Jul 2025 787th albanian-laundromat 637 194 1,412ms 18 Oct 2025 788th cure-honey 🇯🇵 637 230 300ms 8 Jul 2021 789th LlamaLad7 🇬🇧 636 100 21ms 17 Jan 2021 790th aksyristos 636 161 7ms 14 Mar 2023 791st dokutan 636 942 2ms 2 Mar 2024 792nd rucin93 🇵🇱 634 181 419ms 24 Sep 2025 793rd Attero 🇸🇪 633 92 12ms 21 Oct 2020 793rd tpiechaczek 🇵🇱 633 92 11ms 8 Jan 2021 795th MeWhenI 🇻🇦 632 162 5ms 1 Aug 2023 795th edsrzf 🇳🇿 632 162 8ms 9 Feb 2026 797th Shanethegamer 🇺🇸 628 72 177ms 2 Jun 2022 798th c0d3-4-F00d 🇩🇪 628 163 8ms 23 May 2022 799th CatsAreFluffy 627 104 220ms 14 Dec 2022 800th CaedenHarper 🇨🇦 627 183 529ms 30 Oct 2025 First Prev 721–800 of 4,279 Next Last