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 Smooth 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 Luau 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 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 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 Smooth Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Chars Time 592nd tvcv901 873 61 22 Mar 2023 592nd unfinishedprogram 873 61 19 Jul 2023 592nd snoozingnewt 🇺🇸 873 61 23 Sep 2023 592nd funnyboy-roks 873 61 9 May 2024 592nd bac0id 873 61 29 Jun 2024 592nd madex 🇩🇪 873 61 9 Jul 2024 592nd FortuiteMan 🇫🇷 873 61 10 Oct 2024 592nd RobertHoeh 873 61 5 Apr 2025 592nd LvLError 873 61 29 May 2025 592nd Lv0Sys 🇵🇱 873 61 30 May 2025 592nd miles-evan 873 61 5 Aug 2025 612th NerdyMcNerd42 873 64 26 Oct 2022 612th tpasfieldERAU 873 64 14 Nov 2022 612th CheeseCake628 🇳🇴 873 64 6 Jan 2023 612th adamnielson42 🇺🇸 873 64 25 Apr 2023 612th nathsou 🇫🇷 873 64 2 Sep 2023 612th zwxzwxzwx21 873 64 30 Jan 2024 612th steffan-polygolf 873 64 8 Mar 2024 612th Jacob385 873 64 4 Apr 2024 612th gallium-gonzollium 873 64 26 Aug 2024 621st johnnythedoggie 873 72 13 May 2022 621st kaascevich 873 72 8 Jul 2025 623rd Shanethegamer 🇺🇸 872 66 4 May 2022 623rd scpchicken 🇵🇼 872 66 5 May 2022 623rd sisyphus-ppcg 🇦🇺 872 66 6 May 2022 623rd Natanaelel 🇸🇪 872 66 15 Jun 2022 623rd Z-snails 872 66 27 Feb 2023 623rd Jeremy-Stafford 872 66 27 Feb 2023 623rd alomiF 872 66 1 Sep 2023 623rd btnlq 872 66 17 Oct 2023 631st DialFrost 🇸🇬 872 73 3 Jun 2025 632nd DialFrost 🇸🇬 872 86 24 Oct 2024 632nd stefangimmillaro 872 86 14 Jan 2025 634th HPWiz 🇳🇿 871 49 4 May 2022 634th JayXon 🇺🇸 871 49 5 May 2022 634th Steffan153 🇫🇮 871 49 10 Dec 2022 634th ovs-code 🇩🇪 871 49 24 Oct 2023 634th sean-niemann 🇺🇸 871 49 12 Jul 2024 639th dokutan 871 62 28 Apr 2025 640th c0d3-4-F00d 🇩🇪 871 89 5 May 2022 640th fkantelberg 871 89 15 Jul 2023 640th bac0id 871 89 26 Sep 2023 640th TRexOnGit 871 89 16 Feb 2024 640th arcpolaris 871 89 18 Nov 2024 645th inventshah 871 97 6 May 2022 645th roupiq 🇵🇱 871 97 22 Nov 2023 647th GolfingSuccess 🇬🇷 869 71 5 May 2022 647th emplv 🇱🇻 869 71 5 May 2022 647th JayXon 🇺🇸 869 71 7 May 2022 647th m-tkach 🇺🇦 869 71 15 May 2022 647th nwellnhof 🇩🇪 869 71 5 Jun 2022 647th Irratix 🇳🇱 869 71 13 Jun 2022 647th michael-pruglo 🇺🇦 869 71 13 Jul 2022 647th stefangimmillaro 869 71 2 Jun 2023 647th kkoenig 869 71 21 Dec 2023 647th JohandeRuiter 🇳🇱 869 71 14 Sep 2024 647th masinag 🇮🇹 869 71 6 Oct 2024 658th janbehrens 🇩🇪 869 90 21 Apr 2023 658th Yewzir 🇧🇪 869 90 22 Apr 2023 658th DialFrost 🇸🇬 869 90 6 Nov 2023 658th Ripick 869 90 27 Nov 2024 662nd AlephSquirrel 868 80 20 Apr 2023 662nd ashtraypettingzoo 🇺🇸 868 80 1 Apr 2024 664th nwellnhof 🇩🇪 867 53 4 May 2022 664th GrayJoKing 🇦🇺 867 53 6 May 2022 666th Shanethegamer 🇺🇸 866 70 12 Dec 2022 666th Alessandro-Balconi 🇮🇹 866 70 26 Dec 2022 668th dokutan 866 82 1 Jul 2024 669th dieggsy 866 97 8 Oct 2024 670th Andriamanitra 🇫🇮 865 54 21 Jul 2022 670th jared-hughes 865 54 12 Sep 2022 670th OhmNomNom 865 54 7 Oct 2022 670th olleicua 🇺🇸 865 54 21 Jan 2024 670th LostSyntax21 🇬🇧 865 54 12 Mar 2025 670th AbrahamJLR 🇻🇪 865 54 4 Jun 2025 Prev 601–675 of 3,319 Next