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 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 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 Topological Sort 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 Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers 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 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka 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 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 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 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 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 Topological Sort 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 Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Chars Time 504th a6166231 🇨🇳 888 60 15 May 2025 504th Protothor 888 60 8 Jul 2025 504th SebassNoob 888 60 5 Aug 2025 504th Yax42 🇫🇷 888 60 7 days ago 530th Steffan153 🇫🇮 888 80 15 Nov 2022 530th error256 888 80 8 Apr 2025 532nd P-Quentin 🇫🇷 887 63 3 Aug 2022 532nd kaptsanovb 887 63 20 Apr 2023 532nd fkantelberg 887 63 14 Jul 2023 532nd snoozingnewt 🇺🇸 887 63 10 Sep 2023 532nd VictorStenvers 🇳🇱 887 63 13 Nov 2023 532nd 1231234md5 🇨🇳 887 63 14 Dec 2023 532nd f-tucker 887 63 6 Feb 2024 532nd JunkIce 887 63 24 Nov 2024 532nd Kowalskiexe 🇵🇱 887 63 19 Apr 2025 532nd 123mjb 887 63 2 Jun 2025 542nd nwellnhof 🇩🇪 887 111 4 May 2022 542nd stefangimmillaro 887 111 26 Sep 2023 542nd kkoenig 887 111 4 Jan 2024 545th stefangimmillaro 886 71 2 Oct 2022 545th Steffan153 🇫🇮 886 71 23 Feb 2023 545th Shanethegamer 🇺🇸 886 71 16 May 2023 545th sean-niemann 🇺🇸 886 71 12 Jul 2024 549th sean-niemann 🇺🇸 886 73 12 Jul 2024 550th Steffan153 🇫🇮 886 80 11 Dec 2023 551st canissimia 🇦🇶 886 110 20 Feb 2023 552nd c0d3-4-F00d 🇩🇪 886 132 6 May 2022 552nd madeforlosers 886 132 26 Oct 2023 552nd Blockyheadman 886 132 1 Nov 2023 552nd SpiritAxolotl 🇺🇸 886 132 20 Mar 2024 556th Yewzir 🇧🇪 886 150 21 May 2024 557th canissimia 🇦🇶 886 204 25 Nov 2023 558th Shanethegamer 🇺🇸 885 61 31 Oct 2022 558th MeWhenI 🇻🇦 885 61 4 Nov 2022 560th lynn 885 65 5 May 2022 560th GrayJoKing 🇦🇺 885 65 5 May 2022 560th Sakisan 🇧🇪 885 65 6 May 2022 560th JayXon 🇺🇸 885 65 17 Oct 2022 560th Steffan153 🇫🇮 885 65 12 Nov 2022 560th tobeannouncd 885 65 25 Apr 2025 560th sean-niemann 🇺🇸 885 65 9 Jun 2025 567th Steffan153 🇫🇮 884 52 31 Dec 2022 568th Shanethegamer 🇺🇸 884 72 8 May 2025 568th edsrzf 🇳🇿 884 72 4 Jul 2025 570th DialFrost 🇸🇬 884 95 10 Dec 2024 571st m-tkach 🇺🇦 884 117 7 May 2022 571st Lydxn 🇨🇦 884 117 7 May 2022 573rd JayXon 🇺🇸 883 74 14 Nov 2024 574th DialFrost 🇸🇬 882 76 17 Mar 2025 575th GrayJoKing 🇦🇺 882 77 13 Sep 2024 576th primo-ppcg 🇹🇭 882 85 14 Jan 2025 576th MeWhenI 🇻🇦 882 85 21 Apr 2025 578th stefangimmillaro 881 53 2 Oct 2022 578th Haksell 🇦🇶 881 53 22 Feb 2023 580th GrayJoKing 🇦🇺 881 70 6 May 2022 580th ovs-code 🇩🇪 881 70 8 Oct 2023 580th 09cf 881 70 8 Oct 2023 580th saito-ta 🇯🇵 881 70 21 Dec 2023 580th sean-niemann 🇺🇸 881 70 10 Jul 2024 580th KasperKivimaeki 🇫🇮 881 70 8 Aug 2025 586th SiestaGuru 881 88 9 Jan 2023 586th rifatx 881 88 5 Jul 2024 588th m-tkach 🇺🇦 881 112 22 Jun 2025 589th jared-hughes 881 130 15 Dec 2024 590th primo-ppcg 🇹🇭 880 52 5 May 2022 590th dvargas46 🇺🇸 880 52 22 Dec 2022 592nd nipzu 880 94 17 May 2022 592nd Natanaelel 🇸🇪 880 94 17 Jun 2022 592nd nkoppel 880 94 19 Oct 2022 592nd ovs-code 🇩🇪 880 94 21 Jun 2023 592nd mousetail 🇳🇱 880 94 12 Jan 2024 597th Irratix 🇳🇱 880 96 4 May 2022 597th MeWhenI 🇻🇦 880 96 1 Jun 2022 597th janbehrens 🇩🇪 880 96 21 Apr 2023 597th Shanethegamer 🇺🇸 880 96 15 May 2023 Prev 526–600 of 3,312 Next