Collatz in all languages in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous 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 Calendar 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 Minesweeper Morse Decoder Morse Encoder Multitap Input 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 Tower of Hanoi 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 Binary Lambda Calculus Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang 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 ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily 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 Erlang 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 ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily 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 Calendar 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 Minesweeper Morse Decoder Morse Encoder Multitap Input 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 Tower of Hanoi 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 Binary Lambda Calculus Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 715th moikaturns 🇬🇧 877 61 10ms 25 Sep 2022 715th FlorianCassayre 🇫🇷 877 61 10ms 27 Sep 2022 715th Mazn3k 877 61 11ms 1 Feb 2023 715th tvcv901 877 61 12ms 22 Mar 2023 715th unfinishedprogram 877 61 12ms 19 Jul 2023 715th snoozingnewt 🇨🇦 877 61 10ms 23 Sep 2023 715th funnyboy-roks 877 61 11ms 9 May 2024 715th bac0id 877 61 13ms 29 Jun 2024 715th madex 🇩🇪 877 61 11ms 9 Jul 2024 715th FortuiteMan 🇫🇷 877 61 12ms 10 Oct 2024 715th RobertHoeh 877 61 10ms 5 Apr 2025 715th LvLError 877 61 10ms 29 May 2025 715th miles-evan 877 61 11ms 5 Aug 2025 715th alexsave 877 61 10ms 13 Oct 2025 735th nwellnhof 🇩🇪 876 53 6ms 4 May 2022 735th GrayJoKing 🇦🇺 876 53 7ms 6 May 2022 737th GolfingSuccess 🇬🇷 876 57 1,160ms 29 Aug 2025 738th MeWhenI 🇻🇦 876 110 270ms 9 Feb 2023 738th edsrzf 🇳🇿 876 110 296ms 28 Nov 2024 738th targrik 876 110 281ms 30 Jun 2025 741st AlephSquirrel 875 80 12ms 20 Apr 2023 741st ashtraypettingzoo 🇺🇸 875 80 15ms 1 Apr 2024 743rd c0d3-4-F00d 🇩🇪 875 89 368ms 5 May 2022 743rd fkantelberg 875 89 407ms 15 Jul 2023 743rd TRexOnGit 875 89 432ms 16 Feb 2024 746th inventshah 875 97 57ms 6 May 2022 746th roupiq 🇵🇱 875 97 55ms 22 Nov 2023 748th DialFrost 🇸🇬 874 69 88ms 15 Jul 2024 749th Irratix 🇳🇱 874 72 2ms 4 May 2022 749th m-tkach 🇺🇦 874 72 2ms 4 May 2022 749th jared-hughes 874 72 2ms 6 Jul 2022 749th michael-pruglo 🇺🇦 874 72 2ms 13 Jul 2022 749th Steffan153 🇫🇮 874 72 2ms 3 Jan 2023 749th MeWhenI 🇻🇦 874 72 3ms 7 May 2023 749th ListeriaM 874 72 2ms 22 Aug 2023 749th JohandeRuiter 🇳🇱 874 72 3ms 14 Sep 2024 749th larcherMTT 874 72 2ms 5 Oct 2024 749th snyderek 🇺🇸 874 72 3ms 19 Feb 2025 749th 5quiwyrm 874 72 2ms 29 Jun 2025 749th TeodorDyakov 🇧🇬 874 72 3ms 8 Jul 2025 749th xiaoyiming123 874 72 2ms 12 Jul 2025 762nd Steffan153 🇫🇮 874 83 510ms 9 Apr 2023 763rd ovs-code 🇩🇪 874 85 16ms 11 Dec 2023 764th ovs-code 🇩🇪 873 83 54ms 1 Jul 2024 765th Andriamanitra 🇫🇮 872 54 41ms 21 Jul 2022 765th jared-hughes 872 54 37ms 12 Sep 2022 765th OhmNomNom 872 54 37ms 7 Oct 2022 765th olleicua 🇺🇸 872 54 41ms 21 Jan 2024 765th LostSyntax21 🇬🇧 872 54 42ms 12 Mar 2025 765th AbrahamJLR 🇻🇪 872 54 40ms 4 Jun 2025 765th vishal-mohanty 872 54 40ms 25 Aug 2025 772nd DialFrost 🇸🇬 872 64 5ms 10 Jul 2024 773rd Shanethegamer 🇺🇸 872 85 38ms 15 May 2023 773rd albanian-laundromat 872 85 40ms 25 Aug 2025 775th dieggsy 872 97 28ms 8 Oct 2024 776th ulucs 871 35 9ms 8 May 2022 776th bstrat 871 35 9ms 6 Jun 2024 776th wh3n3v3r 🇨🇿 871 35 8ms 18 Nov 2024 779th scpchicken 🇵🇼 871 45 332ms 4 May 2022 779th SirBogman 🇺🇸 871 45 230ms 5 May 2022 781st TFeld00 🇩🇰 871 71 25ms 17 May 2022 781st DialFrost 🇸🇬 871 71 32ms 15 Nov 2022 781st StefanHabel 🇨🇦 871 71 21ms 29 Nov 2022 781st nstearns96 🇬🇧 871 71 24ms 11 Jan 2023 781st hallvabo 🇳🇴 871 71 19ms 7 Feb 2023 781st anter69 🇭🇺 871 71 18ms 21 May 2024 781st rucin93 🇵🇱 871 71 17ms 10 Jul 2024 781st lelbal 871 71 20ms 26 Aug 2025 781st HETHAT 🇩🇿 871 71 25ms 23 Sep 2025 781st 09cf 871 71 19ms 18 Nov 2025 781st blaztoma 🇱🇹 871 71 24ms 25 Nov 2025 781st Languag3 871 71 25ms 5 Dec 2025 781st CommandLeo 🇮🇹 871 71 23ms 8 Jan 2026 794th ovs-code 🇩🇪 871 133 42ms 8 Jul 2024 795th emgordon154 870 160 1,606ms 24 Dec 2025 795th DialFrost 🇸🇬 870 160 1,669ms 20 days ago 797th Steffan153 🇫🇮 869 82 1,388ms 23 Feb 2023 798th 123mjb 869 96 366ms 20 Nov 2025 798th noescareno 869 96 366ms 21 Nov 2025 800th Shanethegamer 🇺🇸 869 98 127ms 15 Apr 2025 First Prev 721–800 of 3,565 Next Last