Collatz in all languages in chars. Cheevos Holes Recent Holes Langs Medals Misc 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 Morse Decoder Morse Encoder 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 Transpose Sentence United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Hilbert Curve Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Topological Sort Trinomial Triangle Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir F# Factor Forth Fortran Gleam Go GolfScript 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir F# Factor Forth Fortran Gleam Go GolfScript 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 Morse Decoder Morse Encoder 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 Transpose Sentence United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Hilbert Curve Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Topological Sort Trinomial Triangle Turtle Tutorial # Golfer Points Chars Time 525th error256 886 80 8 Apr 2025 527th nwellnhof 🇩🇪 886 111 4 May 2022 527th stefangimmillaro 886 111 26 Sep 2023 527th kkoenig 886 111 4 Jan 2024 530th c0d3-4-F00d 🇩🇪 886 132 6 May 2022 530th madeforlosers 886 132 26 Oct 2023 530th Blockyheadman 886 132 1 Nov 2023 530th SpiritAxolotl 🇺🇸 886 132 20 Mar 2024 534th canissimia 🇦🇶 886 204 25 Nov 2023 535th Shanethegamer 🇺🇸 885 61 31 Oct 2022 535th MeWhenI 🇻🇦 885 61 4 Nov 2022 537th lynn 885 65 5 May 2022 537th GrayJoKing 🇦🇺 885 65 5 May 2022 537th Sakisan 🇧🇪 885 65 6 May 2022 537th JayXon 🇺🇸 885 65 17 Oct 2022 537th Steffan153 🇫🇮 885 65 12 Nov 2022 537th tobeannouncd 885 65 25 Apr 2025 537th sean-niemann 🇺🇸 885 65 9 Jun 2025 544th Lydxn 🇨🇦 885 72 16 Jul 2023 545th sean-niemann 🇺🇸 885 73 12 Jul 2024 546th stefangimmillaro 884 71 2 Oct 2022 546th Steffan153 🇫🇮 884 71 23 Feb 2023 546th Shanethegamer 🇺🇸 884 71 16 May 2023 546th sean-niemann 🇺🇸 884 71 12 Jul 2024 550th dokutan 884 82 1 Jul 2024 551st DialFrost 🇸🇬 884 95 10 Dec 2024 552nd canissimia 🇦🇶 884 110 20 Feb 2023 553rd Shanethegamer 🇺🇸 883 72 8 May 2025 553rd edsrzf 🇳🇿 883 72 12 days ago 555th Yewzir 🇧🇪 883 150 21 May 2024 556th Steffan153 🇫🇮 882 52 31 Dec 2022 557th GrayJoKing 🇦🇺 882 77 13 Sep 2024 558th GrayJoKing 🇦🇺 881 70 6 May 2022 558th ovs-code 🇩🇪 881 70 8 Oct 2023 558th 09cf 881 70 8 Oct 2023 558th saito-ta 🇯🇵 881 70 21 Dec 2023 558th sean-niemann 🇺🇸 881 70 10 Jul 2024 563rd JayXon 🇺🇸 881 74 14 Nov 2024 564th DialFrost 🇸🇬 881 76 17 Mar 2025 565th SiestaGuru 881 88 9 Jan 2023 565th rifatx 881 88 5 Jul 2024 567th primo-ppcg 🇹🇭 880 52 5 May 2022 567th dvargas46 🇺🇸 880 52 22 Dec 2022 569th stefangimmillaro 880 53 2 Oct 2022 569th Haksell 🇦🇶 880 53 22 Feb 2023 571st m-tkach 🇺🇦 880 117 7 May 2022 571st Lydxn 🇨🇦 880 117 7 May 2022 573rd ovs-code 🇩🇪 879 89 24 Jul 2024 573rd jipsong 🇩🇪 879 89 7 Apr 2025 575th nipzu 879 94 17 May 2022 575th Natanaelel 🇸🇪 879 94 17 Jun 2022 575th nkoppel 879 94 19 Oct 2022 575th ovs-code 🇩🇪 879 94 21 Jun 2023 575th mousetail 🇳🇱 879 94 12 Jan 2024 580th Irratix 🇳🇱 879 96 4 May 2022 580th MeWhenI 🇻🇦 879 96 1 Jun 2022 580th janbehrens 🇩🇪 879 96 21 Apr 2023 580th Shanethegamer 🇺🇸 879 96 15 May 2023 580th Yewzir 🇧🇪 879 96 11 Nov 2023 580th MateuszPietrzak 🇵🇱 879 96 18 Nov 2023 580th kkoenig 879 96 21 Dec 2023 580th BlankSpruce 879 96 20 Aug 2024 580th fuzzylojik-golf 🇺🇸 879 96 14 Jun 2025 589th jared-hughes 879 130 15 Dec 2024 590th ravnskjaer 🇩🇰 879 133 11 Sep 2024 591st sisyphus-ppcg 🇦🇺 878 40 31 Jan 2023 591st sean-niemann 🇺🇸 878 40 8 Mar 2025 593rd m-tkach 🇺🇦 878 112 23 days ago 594th ovs-code 🇩🇪 877 151 9 Sep 2023 595th steffan-polygolf 876 74 14 Feb 2024 596th primo-ppcg 🇹🇭 876 85 14 Jan 2025 596th MeWhenI 🇻🇦 876 85 21 Apr 2025 598th GrayJoKing 🇦🇺 875 72 31 May 2022 598th Shanethegamer 🇺🇸 875 72 1 Jun 2022 598th Steffan153 🇫🇮 875 72 10 Dec 2022 Prev 526–600 of 3,171 Next