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 Continued Fractions 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four 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 ><> ALGOL 68 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 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 ><> ALGOL 68 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 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 Continued Fractions 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four 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 720th DialFrost 🇸🇬 881 142 1,410ms 28 Mar 2025 720th emgordon154 881 142 1,516ms 10 Apr 2025 720th GolfingSuccess 🇬🇷 881 142 1,534ms 6 Dec 2025 724th JayXon 🇺🇸 881 158 1,772ms 14 Sep 2025 725th dokutan 880 62 5ms 28 Apr 2025 726th johnnythedoggie 880 72 93ms 13 May 2022 726th kaascevich 880 72 90ms 8 Jul 2025 728th emgordon154 880 97 117ms 3 Dec 2025 729th Shanethegamer 🇺🇸 878 66 172ms 4 May 2022 729th scpchicken 🇵🇼 878 66 254ms 5 May 2022 729th sisyphus-ppcg 🇦🇺 878 66 173ms 6 May 2022 729th Natanaelel 🇸🇪 878 66 144ms 15 Jun 2022 729th Z-snails 878 66 254ms 27 Feb 2023 729th Jeremy-Stafford 878 66 258ms 27 Feb 2023 729th alomiF 878 66 293ms 1 Sep 2023 729th btnlq 878 66 145ms 17 Oct 2023 729th Shengxuan-Zhang 878 66 278ms 18 days ago 738th DialFrost 🇸🇬 878 86 40ms 24 Oct 2024 738th stefangimmillaro 878 86 39ms 14 Jan 2025 740th c0d3-4-F00d 🇩🇪 877 61 13ms 6 May 2022 740th jackkav 877 61 10ms 26 Jun 2022 740th TechNolaByte 877 61 10ms 6 Jul 2022 740th Heathcorp 🇦🇺 877 61 11ms 17 Jul 2022 740th C0de5mith 🇺🇸 877 61 10ms 3 Aug 2022 740th sebipopa 🇷🇴 877 61 11ms 18 Aug 2022 740th moikaturns 🇬🇧 877 61 12ms 25 Sep 2022 740th FlorianCassayre 🇫🇷 877 61 11ms 27 Sep 2022 740th Mazn3k 877 61 11ms 1 Feb 2023 740th tvcv901 877 61 11ms 22 Mar 2023 740th unfinishedprogram 877 61 10ms 19 Jul 2023 740th snoozingnewt 🇨🇦 877 61 11ms 23 Sep 2023 740th funnyboy-roks 877 61 10ms 9 May 2024 740th bac0id 877 61 11ms 29 Jun 2024 740th madex 🇩🇪 877 61 12ms 9 Jul 2024 740th FortuiteMan 🇫🇷 877 61 11ms 10 Oct 2024 740th RobertHoeh 877 61 11ms 5 Apr 2025 740th LvLError 877 61 14ms 29 May 2025 740th miles-evan 877 61 13ms 5 Aug 2025 740th alexsave 877 61 12ms 13 Oct 2025 760th nwellnhof 🇩🇪 876 53 7ms 4 May 2022 760th GrayJoKing 🇦🇺 876 53 8ms 6 May 2022 762nd c0d3-4-F00d 🇩🇪 876 89 368ms 5 May 2022 762nd fkantelberg 876 89 388ms 15 Jul 2023 762nd TRexOnGit 876 89 423ms 16 Feb 2024 765th inventshah 876 97 73ms 6 May 2022 765th roupiq 🇵🇱 876 97 66ms 22 Nov 2023 765th emgordon154 876 97 56ms 8 Feb 2026 768th MeWhenI 🇻🇦 876 110 286ms 9 Feb 2023 768th edsrzf 🇳🇿 876 110 267ms 28 Nov 2024 768th targrik 876 110 282ms 30 Jun 2025 771st AlephSquirrel 875 80 12ms 20 Apr 2023 771st ashtraypettingzoo 🇺🇸 875 80 14ms 1 Apr 2024 773rd DialFrost 🇸🇬 874 69 88ms 15 Jul 2024 774th Irratix 🇳🇱 874 72 2ms 4 May 2022 774th m-tkach 🇺🇦 874 72 2ms 4 May 2022 774th jared-hughes 874 72 2ms 6 Jul 2022 774th michael-pruglo 🇺🇦 874 72 2ms 13 Jul 2022 774th Steffan153 🇫🇮 874 72 2ms 3 Jan 2023 774th MeWhenI 🇻🇦 874 72 2ms 7 May 2023 774th ListeriaM 874 72 2ms 22 Aug 2023 774th JohandeRuiter 🇳🇱 874 72 3ms 14 Sep 2024 774th larcherMTT 874 72 2ms 5 Oct 2024 774th snyderek 🇺🇸 874 72 2ms 19 Feb 2025 774th 5quiwyrm 874 72 2ms 29 Jun 2025 774th TeodorDyakov 🇧🇬 874 72 3ms 8 Jul 2025 774th xiaoyiming123 874 72 2ms 12 Jul 2025 787th Steffan153 🇫🇮 874 83 465ms 9 Apr 2023 788th ovs-code 🇩🇪 874 85 15ms 11 Dec 2023 789th DialFrost 🇸🇬 873 64 5ms 10 Jul 2024 790th ovs-code 🇩🇪 873 83 57ms 1 Jul 2024 791st Andriamanitra 🇫🇮 872 54 41ms 21 Jul 2022 791st jared-hughes 872 54 37ms 12 Sep 2022 791st OhmNomNom 872 54 37ms 7 Oct 2022 791st olleicua 🇺🇸 872 54 41ms 21 Jan 2024 791st LostSyntax21 🇬🇧 872 54 41ms 12 Mar 2025 791st AbrahamJLR 🇻🇪 872 54 40ms 4 Jun 2025 791st vishal-mohanty 872 54 40ms 25 Aug 2025 798th Shanethegamer 🇺🇸 872 85 38ms 15 May 2023 798th albanian-laundromat 872 85 40ms 25 Aug 2025 800th dieggsy 872 97 28ms 8 Oct 2024 First Prev 721–800 of 3,619 Next Last