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 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 Trinomial Triangle Turtle Tutorial # Golfer Points Chars Time 524th kkoenig 886 111 4 Jan 2024 527th c0d3-4-F00d 🇩🇪 886 132 6 May 2022 527th madeforlosers 886 132 26 Oct 2023 527th Blockyheadman 886 132 1 Nov 2023 527th SpiritAxolotl 🇺🇸 886 132 20 Mar 2024 531st canissimia 🇦🇶 886 204 25 Nov 2023 532nd Shanethegamer 🇺🇸 885 61 31 Oct 2022 532nd MeWhenI 🇻🇦 885 61 4 Nov 2022 534th lynn 885 65 5 May 2022 534th GrayJoKing 🇦🇺 885 65 5 May 2022 534th Sakisan 🇧🇪 885 65 6 May 2022 534th JayXon 🇺🇸 885 65 17 Oct 2022 534th Steffan153 🇫🇮 885 65 12 Nov 2022 534th tobeannouncd 885 65 25 Apr 2025 534th sean-niemann 🇺🇸 885 65 25 days ago 541st Lydxn 🇨🇦 885 72 16 Jul 2023 542nd sean-niemann 🇺🇸 885 73 12 Jul 2024 543rd dokutan 884 82 1 Jul 2024 544th DialFrost 🇸🇬 884 95 10 Dec 2024 545th canissimia 🇦🇶 884 110 20 Feb 2023 546th Shanethegamer 🇺🇸 883 72 8 May 2025 546th edsrzf 🇳🇿 883 72 28 mins ago 548th Yewzir 🇧🇪 883 150 21 May 2024 549th Steffan153 🇫🇮 882 52 31 Dec 2022 550th stefangimmillaro 882 71 2 Oct 2022 550th Steffan153 🇫🇮 882 71 23 Feb 2023 550th Shanethegamer 🇺🇸 882 71 16 May 2023 550th sean-niemann 🇺🇸 882 71 12 Jul 2024 554th GrayJoKing 🇦🇺 882 77 13 Sep 2024 555th GrayJoKing 🇦🇺 881 70 6 May 2022 555th ovs-code 🇩🇪 881 70 8 Oct 2023 555th 09cf 881 70 8 Oct 2023 555th saito-ta 🇯🇵 881 70 21 Dec 2023 555th sean-niemann 🇺🇸 881 70 10 Jul 2024 560th JayXon 🇺🇸 881 74 14 Nov 2024 561st DialFrost 🇸🇬 881 76 17 Mar 2025 562nd SiestaGuru 881 88 9 Jan 2023 562nd rifatx 881 88 5 Jul 2024 564th primo-ppcg 🇹🇭 880 52 5 May 2022 564th dvargas46 🇺🇸 880 52 22 Dec 2022 566th stefangimmillaro 880 53 2 Oct 2022 566th Haksell 🇦🇶 880 53 22 Feb 2023 568th m-tkach 🇺🇦 880 117 7 May 2022 568th Lydxn 🇨🇦 880 117 7 May 2022 570th ovs-code 🇩🇪 879 89 24 Jul 2024 570th jipsong 🇩🇪 879 89 7 Apr 2025 572nd nipzu 879 94 17 May 2022 572nd Natanaelel 🇸🇪 879 94 17 Jun 2022 572nd nkoppel 879 94 19 Oct 2022 572nd ovs-code 🇩🇪 879 94 21 Jun 2023 572nd mousetail 🇳🇱 879 94 12 Jan 2024 577th Irratix 🇳🇱 879 96 4 May 2022 577th MeWhenI 🇻🇦 879 96 1 Jun 2022 577th janbehrens 🇩🇪 879 96 21 Apr 2023 577th Shanethegamer 🇺🇸 879 96 15 May 2023 577th Yewzir 🇧🇪 879 96 11 Nov 2023 577th MateuszPietrzak 🇵🇱 879 96 18 Nov 2023 577th kkoenig 879 96 21 Dec 2023 577th BlankSpruce 879 96 20 Aug 2024 577th fuzzylojik-golf 🇺🇸 879 96 20 days ago 586th jared-hughes 879 130 15 Dec 2024 587th ravnskjaer 🇩🇰 879 133 11 Sep 2024 588th sisyphus-ppcg 🇦🇺 878 40 31 Jan 2023 588th sean-niemann 🇺🇸 878 40 8 Mar 2025 590th m-tkach 🇺🇦 878 112 11 days ago 591st ovs-code 🇩🇪 877 151 9 Sep 2023 592nd steffan-polygolf 876 74 14 Feb 2024 593rd primo-ppcg 🇹🇭 876 85 14 Jan 2025 593rd MeWhenI 🇻🇦 876 85 21 Apr 2025 595th GrayJoKing 🇦🇺 875 72 31 May 2022 595th Shanethegamer 🇺🇸 875 72 1 Jun 2022 595th Steffan153 🇫🇮 875 72 10 Dec 2022 598th Shanethegamer 🇺🇸 875 142 27 Mar 2025 598th DialFrost 🇸🇬 875 142 28 Mar 2025 598th emgordon154 875 142 10 Apr 2025 Prev 526–600 of 3,148 Next