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 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 Bytes Time 800th RZ781 888 75 19 Nov 2023 800th mikehanus 888 75 21 Nov 2023 800th 1231234md5 🇨🇳 888 75 14 Dec 2023 800th Hebelub 888 75 6 Jan 2024 800th minhtrancccp 888 75 11 Jan 2024 800th 123mjb 888 75 25 Jan 2024 800th jbjd 888 75 25 Feb 2024 800th gabe-gallegos 888 75 2 May 2024 800th kejcao 🇨🇦 888 75 11 May 2024 800th f-tucker 888 75 24 May 2024 800th Florian-Mt 888 75 22 Jul 2024 800th codingisgreatbutiamnot 888 75 9 Aug 2024 800th Terobero 888 75 23 Aug 2024 800th abhishekg999 888 75 17 Sep 2024 800th RedzGoose 🇦🇺 888 75 7 Oct 2024 800th Clay-Goodling 888 75 8 Oct 2024 800th JunkIce 888 75 5 Mar 2025 800th jiji7879 888 75 20 Jun 2025 800th faragocsaba 888 75 22 Jun 2025 800th bknower 888 75 30 Jun 2025 800th clayboll99 888 75 14 Jul 2025 800th edsrzf 🇳🇿 888 75 18 days ago 848th c0d3-4-F00d 🇩🇪 888 132 6 May 2022 848th madeforlosers 888 132 26 Oct 2023 848th Blockyheadman 888 132 1 Nov 2023 848th SpiritAxolotl 🇺🇸 888 132 20 Mar 2024 852nd canissimia 🇦🇶 888 204 25 Nov 2023 853rd MeWhenI 🇻🇦 887 53 1 Jun 2022 853rd stefangimmillaro 887 53 2 Oct 2022 853rd Haksell 🇦🇶 887 53 22 Feb 2023 856th m-tkach 🇺🇦 887 117 7 May 2022 856th Lydxn 🇨🇦 887 117 7 May 2022 858th m-tkach 🇺🇦 886 112 22 Jun 2025 859th jared-hughes 886 130 15 Dec 2024 860th Shanethegamer 🇺🇸 885 70 12 Dec 2022 860th Alessandro-Balconi 🇮🇹 885 70 26 Dec 2022 862nd GolfingSuccess 🇬🇷 885 71 5 May 2022 862nd emplv 🇱🇻 885 71 5 May 2022 862nd JayXon 🇺🇸 885 71 7 May 2022 862nd nwellnhof 🇩🇪 885 71 5 Jun 2022 862nd stefangimmillaro 885 71 2 Jun 2023 862nd 09cf 885 71 4 Oct 2023 862nd kkoenig 885 71 21 Dec 2023 862nd sean-niemann 🇺🇸 885 71 10 Jul 2024 862nd masinag 🇮🇹 885 71 6 Oct 2024 871st primo-ppcg 🇹🇭 885 85 14 Jan 2025 871st MeWhenI 🇻🇦 885 85 21 Apr 2025 873rd SiestaGuru 884 88 9 Jan 2023 873rd rifatx 884 88 5 Jul 2024 875th janbehrens 🇩🇪 884 90 21 Apr 2023 875th Yewzir 🇧🇪 884 90 22 Apr 2023 875th DialFrost 🇸🇬 884 90 6 Nov 2023 875th Ripick 884 90 27 Nov 2024 879th Shanethegamer 🇺🇸 884 152 9 Sep 2023 879th emgordon154 884 152 2 Oct 2024 879th DialFrost 🇸🇬 884 152 27 Oct 2024 882nd m-tkach 🇺🇦 883 59 21 Jan 2024 882nd GolfingSuccess 🇬🇷 883 59 20 Jan 2025 884th ovs-code 🇩🇪 883 73 22 Jul 2023 885th steffan-polygolf 883 74 14 Feb 2024 886th nipzu 883 94 17 May 2022 886th Natanaelel 🇸🇪 883 94 17 Jun 2022 886th nkoppel 883 94 19 Oct 2022 886th ovs-code 🇩🇪 883 94 21 Jun 2023 886th mousetail 🇳🇱 883 94 12 Jan 2024 891st Shanethegamer 🇺🇸 882 51 15 May 2023 892nd Irratix 🇳🇱 882 96 4 May 2022 892nd MeWhenI 🇻🇦 882 96 1 Jun 2022 892nd janbehrens 🇩🇪 882 96 21 Apr 2023 892nd Shanethegamer 🇺🇸 882 96 15 May 2023 892nd Yewzir 🇧🇪 882 96 11 Nov 2023 892nd MateuszPietrzak 🇵🇱 882 96 18 Nov 2023 892nd kkoenig 882 96 21 Dec 2023 892nd BlankSpruce 882 96 20 Aug 2024 892nd fuzzylojik-golf 🇺🇸 882 96 14 Jun 2025 Prev 826–900 of 3,268 Next