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 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 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 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 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 522nd VictorStenvers 🇳🇱 887 63 13 Nov 2023 522nd 1231234md5 🇨🇳 887 63 14 Dec 2023 522nd f-tucker 887 63 6 Feb 2024 522nd JunkIce 887 63 24 Nov 2024 522nd Kowalskiexe 🇵🇱 887 63 19 Apr 2025 522nd 123mjb 887 63 2 Jun 2025 532nd Lydxn 🇨🇦 887 72 16 Jul 2023 533rd sean-niemann 🇺🇸 886 73 12 Jul 2024 534th Steffan153 🇫🇮 886 80 11 Dec 2023 535th canissimia 🇦🇶 886 110 20 Feb 2023 536th nwellnhof 🇩🇪 886 111 4 May 2022 536th stefangimmillaro 886 111 26 Sep 2023 536th kkoenig 886 111 4 Jan 2024 539th c0d3-4-F00d 🇩🇪 886 132 6 May 2022 539th madeforlosers 886 132 26 Oct 2023 539th Blockyheadman 886 132 1 Nov 2023 539th SpiritAxolotl 🇺🇸 886 132 20 Mar 2024 543rd Yewzir 🇧🇪 886 150 21 May 2024 544th canissimia 🇦🇶 886 204 25 Nov 2023 545th Shanethegamer 🇺🇸 885 61 31 Oct 2022 545th MeWhenI 🇻🇦 885 61 4 Nov 2022 547th lynn 885 65 5 May 2022 547th GrayJoKing 🇦🇺 885 65 5 May 2022 547th Sakisan 🇧🇪 885 65 6 May 2022 547th JayXon 🇺🇸 885 65 17 Oct 2022 547th Steffan153 🇫🇮 885 65 12 Nov 2022 547th tobeannouncd 885 65 25 Apr 2025 547th sean-niemann 🇺🇸 885 65 9 Jun 2025 554th stefangimmillaro 884 71 2 Oct 2022 554th Steffan153 🇫🇮 884 71 23 Feb 2023 554th Shanethegamer 🇺🇸 884 71 16 May 2023 554th sean-niemann 🇺🇸 884 71 12 Jul 2024 558th Shanethegamer 🇺🇸 884 72 8 May 2025 558th edsrzf 🇳🇿 884 72 4 Jul 2025 560th DialFrost 🇸🇬 884 95 10 Dec 2024 561st Steffan153 🇫🇮 883 52 31 Dec 2022 562nd DialFrost 🇸🇬 882 76 17 Mar 2025 563rd GrayJoKing 🇦🇺 882 77 13 Sep 2024 564th m-tkach 🇺🇦 882 117 7 May 2022 564th Lydxn 🇨🇦 882 117 7 May 2022 566th stefangimmillaro 881 53 2 Oct 2022 566th Haksell 🇦🇶 881 53 22 Feb 2023 568th GrayJoKing 🇦🇺 881 70 6 May 2022 568th ovs-code 🇩🇪 881 70 8 Oct 2023 568th 09cf 881 70 8 Oct 2023 568th saito-ta 🇯🇵 881 70 21 Dec 2023 568th sean-niemann 🇺🇸 881 70 10 Jul 2024 568th KasperKivimaeki 🇫🇮 881 70 18 days ago 574th JayXon 🇺🇸 881 74 14 Nov 2024 575th SiestaGuru 881 88 9 Jan 2023 575th rifatx 881 88 5 Jul 2024 577th m-tkach 🇺🇦 881 112 22 Jun 2025 578th jared-hughes 881 130 15 Dec 2024 579th primo-ppcg 🇹🇭 880 52 5 May 2022 579th dvargas46 🇺🇸 880 52 22 Dec 2022 581st primo-ppcg 🇹🇭 880 85 14 Jan 2025 581st MeWhenI 🇻🇦 880 85 21 Apr 2025 583rd nipzu 880 94 17 May 2022 583rd Natanaelel 🇸🇪 880 94 17 Jun 2022 583rd nkoppel 880 94 19 Oct 2022 583rd ovs-code 🇩🇪 880 94 21 Jun 2023 583rd mousetail 🇳🇱 880 94 12 Jan 2024 588th ovs-code 🇩🇪 880 151 9 Sep 2023 589th ovs-code 🇩🇪 879 89 24 Jul 2024 589th jipsong 🇩🇪 879 89 7 Apr 2025 591st Irratix 🇳🇱 879 96 4 May 2022 591st MeWhenI 🇻🇦 879 96 1 Jun 2022 591st janbehrens 🇩🇪 879 96 21 Apr 2023 591st Shanethegamer 🇺🇸 879 96 15 May 2023 591st Yewzir 🇧🇪 879 96 11 Nov 2023 591st MateuszPietrzak 🇵🇱 879 96 18 Nov 2023 591st kkoenig 879 96 21 Dec 2023 591st BlankSpruce 879 96 20 Aug 2024 591st fuzzylojik-golf 🇺🇸 879 96 14 Jun 2025 600th ravnskjaer 🇩🇰 879 133 11 Sep 2024 Prev 526–600 of 3,261 Next