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 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 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 Calendar 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 Multitap Input 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 Arturo Befunge BQN CJam CoffeeScript Egel 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 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 Arturo Befunge BQN CJam CoffeeScript Egel 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 Minesweeper 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 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 Calendar 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 Multitap Input 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 672nd Yewzir 🇧🇪 883 96 58ms 11 Nov 2023 672nd MateuszPietrzak 🇵🇱 883 96 55ms 18 Nov 2023 672nd kkoenig 883 96 53ms 21 Dec 2023 672nd BlankSpruce 883 96 56ms 20 Aug 2024 672nd fuzzylojik-golf 🇺🇸 883 96 57ms 14 Jun 2025 681st Shanethegamer 🇺🇸 882 51 420ms 15 May 2023 682nd GrayJoKing 🇦🇺 882 60 133ms 24 Oct 2024 683rd Shanethegamer 🇺🇸 881 73 90ms 8 May 2025 683rd DialFrost 🇸🇬 881 73 83ms 3 Jun 2025 683rd edsrzf 🇳🇿 881 73 98ms 4 Jul 2025 686th GrayJoKing 🇦🇺 881 84 37ms 19 Jun 2022 686th primo-ppcg 🇹🇭 881 84 36ms 29 Jun 2022 688th Shanethegamer 🇺🇸 881 142 438ms 27 Mar 2025 688th DialFrost 🇸🇬 881 142 456ms 28 Mar 2025 688th emgordon154 881 142 393ms 10 Apr 2025 688th GolfingSuccess 🇬🇷 881 142 393ms 5 days ago 692nd primo-ppcg 🇹🇭 881 193 107ms 14 Aug 2025 693rd johnnythedoggie 880 72 91ms 13 May 2022 693rd kaascevich 880 72 88ms 8 Jul 2025 695th Grrisly 880 74 4ms 25 Mar 2024 696th dokutan 879 62 5ms 28 Apr 2025 697th Shanethegamer 🇺🇸 878 66 172ms 4 May 2022 697th scpchicken 🇵🇼 878 66 254ms 5 May 2022 697th sisyphus-ppcg 🇦🇺 878 66 174ms 6 May 2022 697th Natanaelel 🇸🇪 878 66 144ms 15 Jun 2022 697th Z-snails 878 66 254ms 27 Feb 2023 697th Jeremy-Stafford 878 66 258ms 27 Feb 2023 697th alomiF 878 66 293ms 1 Sep 2023 697th btnlq 878 66 145ms 17 Oct 2023 705th DialFrost 🇸🇬 878 86 40ms 24 Oct 2024 705th stefangimmillaro 878 86 42ms 14 Jan 2025 707th JayXon 🇺🇸 878 158 1,772ms 14 Sep 2025 708th c0d3-4-F00d 🇩🇪 877 61 10ms 6 May 2022 708th jackkav 877 61 10ms 26 Jun 2022 708th TechNolaByte 877 61 10ms 6 Jul 2022 708th Heathcorp 🇦🇺 877 61 9ms 17 Jul 2022 708th C0de5mith 🇺🇸 877 61 11ms 3 Aug 2022 708th sebipopa 🇷🇴 877 61 10ms 18 Aug 2022 708th moikaturns 🇬🇧 877 61 9ms 25 Sep 2022 708th FlorianCassayre 🇫🇷 877 61 10ms 27 Sep 2022 708th Mazn3k 877 61 10ms 1 Feb 2023 708th tvcv901 877 61 10ms 22 Mar 2023 708th unfinishedprogram 877 61 10ms 19 Jul 2023 708th snoozingnewt 🇨🇦 877 61 10ms 23 Sep 2023 708th funnyboy-roks 877 61 10ms 9 May 2024 708th bac0id 877 61 10ms 29 Jun 2024 708th madex 🇩🇪 877 61 10ms 9 Jul 2024 708th FortuiteMan 🇫🇷 877 61 9ms 10 Oct 2024 708th RobertHoeh 877 61 13ms 5 Apr 2025 708th LvLError 877 61 10ms 29 May 2025 708th miles-evan 877 61 10ms 5 Aug 2025 708th alexsave 877 61 10ms 13 Oct 2025 728th GolfingSuccess 🇬🇷 876 57 819ms 29 Aug 2025 729th MeWhenI 🇻🇦 876 110 278ms 9 Feb 2023 729th edsrzf 🇳🇿 876 110 258ms 28 Nov 2024 729th targrik 876 110 267ms 30 Jun 2025 732nd nwellnhof 🇩🇪 875 53 6ms 4 May 2022 732nd GrayJoKing 🇦🇺 875 53 7ms 6 May 2022 734th AlephSquirrel 875 80 12ms 20 Apr 2023 734th ashtraypettingzoo 🇺🇸 875 80 15ms 1 Apr 2024 736th c0d3-4-F00d 🇩🇪 875 89 311ms 5 May 2022 736th fkantelberg 875 89 306ms 15 Jul 2023 736th TRexOnGit 875 89 320ms 16 Feb 2024 739th emgordon154 875 97 100ms 7 days ago 740th Steffan153 🇫🇮 874 83 446ms 9 Apr 2023 741st ovs-code 🇩🇪 874 85 15ms 11 Dec 2023 742nd inventshah 874 97 59ms 6 May 2022 742nd roupiq 🇵🇱 874 97 55ms 22 Nov 2023 744th MeWhenI 🇻🇦 873 71 106ms 13 Dec 2022 745th Irratix 🇳🇱 873 72 2ms 4 May 2022 745th m-tkach 🇺🇦 873 72 2ms 4 May 2022 745th jared-hughes 873 72 2ms 6 Jul 2022 745th michael-pruglo 🇺🇦 873 72 2ms 13 Jul 2022 745th Steffan153 🇫🇮 873 72 2ms 3 Jan 2023 745th MeWhenI 🇻🇦 873 72 3ms 7 May 2023 First Prev 676–750 of 3,515 Next Last