Collatz in all languages in bytes. 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 Trinomial Triangle 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 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 Trinomial Triangle 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 Turtle Tutorial # Golfer Points Bytes Time 798th 1231234md5 🇨🇳 889 75 14 Dec 2023 798th Hebelub 889 75 6 Jan 2024 798th minhtrancccp 889 75 11 Jan 2024 798th 123mjb 889 75 25 Jan 2024 798th jbjd 889 75 25 Feb 2024 798th gabe-gallegos 889 75 2 May 2024 798th kejcao 🇨🇦 889 75 11 May 2024 798th f-tucker 889 75 24 May 2024 798th Florian-Mt 889 75 22 Jul 2024 798th codingisgreatbutiamnot 889 75 9 Aug 2024 798th Terobero 889 75 23 Aug 2024 798th abhishekg999 889 75 17 Sep 2024 798th RedzGoose 🇦🇺 889 75 7 Oct 2024 798th Clay-Goodling 889 75 8 Oct 2024 798th JunkIce 889 75 5 Mar 2025 798th jiji7879 889 75 20 Jun 2025 798th faragocsaba 889 75 22 Jun 2025 798th bknower 889 75 30 Jun 2025 798th clayboll99 889 75 14 Jul 2025 798th fvla 889 75 7 hours ago 846th mousetail 🇳🇱 888 41 29 Aug 2025 847th primo-ppcg 🇹🇭 888 85 14 Jan 2025 847th MeWhenI 🇻🇦 888 85 21 Apr 2025 849th jared-hughes 888 130 15 Dec 2024 850th canissimia 🇦🇶 888 204 25 Nov 2023 851st MeWhenI 🇻🇦 887 53 1 Jun 2022 851st stefangimmillaro 887 53 2 Oct 2022 851st Haksell 🇦🇶 887 53 22 Feb 2023 854th Shanethegamer 🇺🇸 886 70 12 Dec 2022 854th Alessandro-Balconi 🇮🇹 886 70 26 Dec 2022 856th ovs-code 🇩🇪 886 73 22 Jul 2023 857th albanian-laundromat 886 94 20 days ago 857th kmathis22 886 94 8 hours ago 859th m-tkach 🇺🇦 886 112 22 Jun 2025 860th GolfingSuccess 🇬🇷 885 71 5 May 2022 860th emplv 🇱🇻 885 71 5 May 2022 860th JayXon 🇺🇸 885 71 7 May 2022 860th nwellnhof 🇩🇪 885 71 5 Jun 2022 860th stefangimmillaro 885 71 2 Jun 2023 860th 09cf 885 71 4 Oct 2023 860th kkoenig 885 71 21 Dec 2023 860th sean-niemann 🇺🇸 885 71 10 Jul 2024 860th masinag 🇮🇹 885 71 6 Oct 2024 869th SiestaGuru 885 88 9 Jan 2023 869th rifatx 885 88 5 Jul 2024 869th kmathis22 885 88 19 days ago 872nd janbehrens 🇩🇪 885 90 21 Apr 2023 872nd Yewzir 🇧🇪 885 90 22 Apr 2023 872nd DialFrost 🇸🇬 885 90 6 Nov 2023 872nd Ripick 885 90 27 Nov 2024 876th m-tkach 🇺🇦 884 59 21 Jan 2024 876th GolfingSuccess 🇬🇷 884 59 20 Jan 2025 878th nipzu 884 94 17 May 2022 878th Natanaelel 🇸🇪 884 94 17 Jun 2022 878th nkoppel 884 94 19 Oct 2022 878th ovs-code 🇩🇪 884 94 21 Jun 2023 878th mousetail 🇳🇱 884 94 12 Jan 2024 883rd MeWhenI 🇻🇦 884 110 9 Feb 2023 883rd edsrzf 🇳🇿 884 110 28 Nov 2024 883rd targrik 884 110 30 Jun 2025 886th steffan-polygolf 883 74 14 Feb 2024 887th kg583 🇺🇸 883 84 30 Jul 2025 888th Irratix 🇳🇱 883 96 4 May 2022 888th MeWhenI 🇻🇦 883 96 1 Jun 2022 888th janbehrens 🇩🇪 883 96 21 Apr 2023 888th Shanethegamer 🇺🇸 883 96 15 May 2023 888th Yewzir 🇧🇪 883 96 11 Nov 2023 888th MateuszPietrzak 🇵🇱 883 96 18 Nov 2023 888th kkoenig 883 96 21 Dec 2023 888th BlankSpruce 883 96 20 Aug 2024 888th fuzzylojik-golf 🇺🇸 883 96 14 Jun 2025 897th Shanethegamer 🇺🇸 882 51 15 May 2023 898th GrayJoKing 🇦🇺 882 60 24 Oct 2024 899th Shanethegamer 🇺🇸 881 73 8 May 2025 899th DialFrost 🇸🇬 881 73 3 Jun 2025 First Prev 826–900 of 3,395 Next Last