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 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 Hilbert Curve 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 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 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 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 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 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 Hilbert Curve 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 526th Steffan153 🇫🇮 886 80 15 Nov 2022 526th error256 886 80 8 Apr 2025 528th Shanethegamer 🇺🇸 886 81 19 Dec 2023 528th edsrzf 🇳🇿 886 81 6 Jan 2025 528th emgordon154 886 81 5 days ago 531st nwellnhof 🇩🇪 886 111 4 May 2022 531st stefangimmillaro 886 111 26 Sep 2023 531st kkoenig 886 111 4 Jan 2024 534th c0d3-4-F00d 🇩🇪 886 132 6 May 2022 534th madeforlosers 886 132 26 Oct 2023 534th Blockyheadman 886 132 1 Nov 2023 534th SpiritAxolotl 🇺🇸 886 132 20 Mar 2024 538th canissimia 🇦🇶 886 204 25 Nov 2023 539th Shanethegamer 🇺🇸 885 61 31 Oct 2022 539th MeWhenI 🇻🇦 885 61 4 Nov 2022 541st lynn 885 65 5 May 2022 541st GrayJoKing 🇦🇺 885 65 5 May 2022 541st Sakisan 🇧🇪 885 65 6 May 2022 541st JayXon 🇺🇸 885 65 17 Oct 2022 541st Steffan153 🇫🇮 885 65 12 Nov 2022 541st tobeannouncd 885 65 25 Apr 2025 541st sean-niemann 🇺🇸 885 65 9 Jun 2025 548th sean-niemann 🇺🇸 885 73 12 Jul 2024 549th Yewzir 🇧🇪 885 150 21 May 2024 550th stefangimmillaro 884 71 2 Oct 2022 550th Steffan153 🇫🇮 884 71 23 Feb 2023 550th Shanethegamer 🇺🇸 884 71 16 May 2023 550th sean-niemann 🇺🇸 884 71 12 Jul 2024 554th DialFrost 🇸🇬 884 95 10 Dec 2024 555th canissimia 🇦🇶 884 110 20 Feb 2023 556th Shanethegamer 🇺🇸 883 72 8 May 2025 556th edsrzf 🇳🇿 883 72 4 Jul 2025 558th Steffan153 🇫🇮 882 52 31 Dec 2022 559th GrayJoKing 🇦🇺 882 77 13 Sep 2024 560th GrayJoKing 🇦🇺 881 70 6 May 2022 560th ovs-code 🇩🇪 881 70 8 Oct 2023 560th 09cf 881 70 8 Oct 2023 560th saito-ta 🇯🇵 881 70 21 Dec 2023 560th sean-niemann 🇺🇸 881 70 10 Jul 2024 565th JayXon 🇺🇸 881 74 14 Nov 2024 566th DialFrost 🇸🇬 881 76 17 Mar 2025 567th SiestaGuru 881 88 9 Jan 2023 567th rifatx 881 88 5 Jul 2024 569th primo-ppcg 🇹🇭 880 52 5 May 2022 569th dvargas46 🇺🇸 880 52 22 Dec 2022 571st stefangimmillaro 880 53 2 Oct 2022 571st Haksell 🇦🇶 880 53 22 Feb 2023 573rd nipzu 880 94 17 May 2022 573rd Natanaelel 🇸🇪 880 94 17 Jun 2022 573rd nkoppel 880 94 19 Oct 2022 573rd ovs-code 🇩🇪 880 94 21 Jun 2023 573rd mousetail 🇳🇱 880 94 12 Jan 2024 578th m-tkach 🇺🇦 880 117 7 May 2022 578th Lydxn 🇨🇦 880 117 7 May 2022 580th primo-ppcg 🇹🇭 879 85 14 Jan 2025 580th MeWhenI 🇻🇦 879 85 21 Apr 2025 582nd ovs-code 🇩🇪 879 89 24 Jul 2024 582nd jipsong 🇩🇪 879 89 7 Apr 2025 584th Irratix 🇳🇱 879 96 4 May 2022 584th MeWhenI 🇻🇦 879 96 1 Jun 2022 584th janbehrens 🇩🇪 879 96 21 Apr 2023 584th Shanethegamer 🇺🇸 879 96 15 May 2023 584th Yewzir 🇧🇪 879 96 11 Nov 2023 584th MateuszPietrzak 🇵🇱 879 96 18 Nov 2023 584th kkoenig 879 96 21 Dec 2023 584th BlankSpruce 879 96 20 Aug 2024 584th fuzzylojik-golf 🇺🇸 879 96 14 Jun 2025 593rd jared-hughes 879 130 15 Dec 2024 594th ravnskjaer 🇩🇰 879 133 11 Sep 2024 595th ovs-code 🇩🇪 879 151 9 Sep 2023 596th sisyphus-ppcg 🇦🇺 878 40 31 Jan 2023 596th sean-niemann 🇺🇸 878 40 8 Mar 2025 598th m-tkach 🇺🇦 878 112 22 Jun 2025 599th steffan-polygolf 876 74 14 Feb 2024 600th GrayJoKing 🇦🇺 875 72 31 May 2022 Prev 526–600 of 3,204 Next