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 600th dokutan 873 57 9 Aug 2024 602nd c0d3-4-F00d 🇩🇪 873 61 6 May 2022 602nd jackkav 873 61 26 Jun 2022 602nd TechNolaByte 873 61 6 Jul 2022 602nd Heathcorp 🇦🇺 873 61 17 Jul 2022 602nd C0de5mith 🇺🇸 873 61 3 Aug 2022 602nd sebipopa 🇷🇴 873 61 18 Aug 2022 602nd moikaturns 🇬🇧 873 61 25 Sep 2022 602nd FlorianCassayre 🇫🇷 873 61 27 Sep 2022 602nd Mazn3k 873 61 1 Feb 2023 602nd tvcv901 873 61 22 Mar 2023 602nd unfinishedprogram 873 61 19 Jul 2023 602nd snoozingnewt 🇺🇸 873 61 23 Sep 2023 602nd funnyboy-roks 873 61 9 May 2024 602nd bac0id 873 61 29 Jun 2024 602nd madex 🇩🇪 873 61 9 Jul 2024 602nd cdesodt 873 61 10 Oct 2024 602nd RobertHoeh 873 61 5 Apr 2025 602nd kirjavascript 873 61 4 May 2025 602nd LvLError 873 61 29 May 2025 602nd Lv0Sys 🇵🇱 873 61 30 May 2025 602nd Protothor 873 61 30 May 2025 623rd NerdyMcNerd42 873 64 26 Oct 2022 623rd tpasfieldERAU 873 64 14 Nov 2022 623rd CheeseCake628 🇳🇴 873 64 6 Jan 2023 623rd adamnielson42 🇺🇸 873 64 25 Apr 2023 623rd nathsou 🇫🇷 873 64 2 Sep 2023 623rd zwxzwxzwx21 873 64 30 Jan 2024 623rd steffan-polygolf 873 64 8 Mar 2024 623rd Jacob385 873 64 4 Apr 2024 623rd gallium-gonzollium 873 64 26 Aug 2024 632nd ovs-code 🇩🇪 873 73 22 Jul 2023 633rd Grrisly 873 74 25 Mar 2024 634th GrayJoKing 🇦🇺 872 84 19 Jun 2022 634th primo-ppcg 🇹🇭 872 84 29 Jun 2022 636th althryenix 872 134 25 Jul 2022 636th MrGagnonHPS 872 134 1 Nov 2023 636th noescareno 872 134 31 May 2025 636th Schmitt-Very-Cool 872 134 17 days ago 640th Shanethegamer 🇺🇸 872 152 9 Sep 2023 640th emgordon154 872 152 2 Oct 2024 640th DialFrost 🇸🇬 872 152 27 Oct 2024 643rd HPWiz 🇳🇿 871 49 4 May 2022 643rd JayXon 🇺🇸 871 49 5 May 2022 643rd Steffan153 🇫🇮 871 49 10 Dec 2022 643rd ovs-code 🇩🇪 871 49 24 Oct 2023 643rd sean-niemann 🇺🇸 871 49 12 Jul 2024 648th Shanethegamer 🇺🇸 871 66 4 May 2022 648th scpchicken 🇵🇼 871 66 5 May 2022 648th sisyphus-ppcg 🇦🇺 871 66 6 May 2022 648th Natanaelel 🇸🇪 871 66 15 Jun 2022 648th Z-snails 871 66 27 Feb 2023 648th Jeremy-Stafford 871 66 27 Feb 2023 648th alomiF 871 66 1 Sep 2023 648th btnlq 871 66 17 Oct 2023 656th c0d3-4-F00d 🇩🇪 871 89 5 May 2022 656th fkantelberg 871 89 15 Jul 2023 656th bac0id 871 89 26 Sep 2023 656th TRexOnGit 871 89 16 Feb 2024 656th arcpolaris 871 89 18 Nov 2024 661st dokutan 870 62 28 Apr 2025 662nd johnnythedoggie 870 72 13 May 2022 663rd DialFrost 🇸🇬 870 73 3 Jun 2025 664th inventshah 870 97 6 May 2022 664th roupiq 🇵🇱 870 97 22 Nov 2023 666th MeWhenI 🇻🇦 870 207 21 Apr 2025 667th janbehrens 🇩🇪 869 90 21 Apr 2023 667th Yewzir 🇧🇪 869 90 22 Apr 2023 667th DialFrost 🇸🇬 869 90 6 Nov 2023 667th Ripick 869 90 27 Nov 2024 671st GolfingSuccess 🇬🇷 868 71 5 May 2022 671st emplv 🇱🇻 868 71 5 May 2022 671st JayXon 🇺🇸 868 71 7 May 2022 671st m-tkach 🇺🇦 868 71 15 May 2022 671st nwellnhof 🇩🇪 868 71 5 Jun 2022 Prev 601–675 of 3,146 Next