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 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 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 376th KrausRaus 🇺🇸 907 59 10ms 4 May 2022 376th voytxt 🇨🇿 907 59 9ms 4 May 2022 376th KingSkyrock 🇺🇸 907 59 9ms 18 May 2022 376th ZakkkkAttackkkk 🇵🇭 907 59 10ms 14 Jul 2022 376th aksyristos 907 59 11ms 28 Oct 2022 376th nstearns96 🇬🇧 907 59 11ms 28 Nov 2022 376th janbehrens 🇩🇪 907 59 10ms 17 May 2023 376th Shanethegamer 🇺🇸 907 59 10ms 25 May 2023 376th Maznek 907 59 10ms 26 Jun 2023 376th SpiritAxolotl 🇺🇸 907 59 12ms 20 Mar 2024 376th Andrey-Plotnikov 907 59 9ms 19 May 2024 376th emgordon154 907 59 10ms 5 Aug 2024 376th duckyluuk 🇳🇱 907 59 10ms 3 Oct 2024 376th lifthrasiir 🇰🇷 907 59 10ms 23 Nov 2024 376th fuzzylojik-golf 🇺🇸 907 59 10ms 1 Jun 2025 376th acollett89 907 59 10ms 17 Jun 2025 376th iczelia 🇩🇪 907 59 11ms 23 Sep 2025 393rd nipzu 906 48 51ms 8 Sep 2024 394th Steffan153 🇫🇮 906 80 26ms 15 Nov 2022 394th error256 906 80 115ms 8 Apr 2025 396th Shanethegamer 🇺🇸 906 82 17ms 19 Dec 2023 396th edsrzf 🇳🇿 906 82 18ms 6 Jan 2025 398th krcs 🇵🇱 906 86 309ms 10 May 2022 398th billings7 🇬🇧 906 86 328ms 15 May 2022 398th revlayle 🇺🇸 906 86 330ms 7 Dec 2022 398th Widgitty 906 86 326ms 1 Sep 2023 398th albanian-laundromat 906 86 362ms 30 Sep 2025 403rd shinh 905 52 42ms 29 Jun 2022 404th Lydxn 🇨🇦 905 64 199ms 1 Apr 2023 405th Lydxn 🇨🇦 905 70 88ms 7 May 2022 406th MeWhenI 🇻🇦 905 71 102ms 20 Aug 2024 407th Shanethegamer 🇺🇸 904 72 3ms 4 May 2022 407th jared-hughes 904 72 4ms 4 May 2022 407th Waffle3z 904 72 4ms 5 May 2022 407th m-tkach 🇺🇦 904 72 97ms 16 Oct 2022 407th GrayJoKing 🇦🇺 904 72 102ms 22 Oct 2022 407th emplv 🇱🇻 904 72 100ms 27 Oct 2022 407th sean-niemann 🇺🇸 904 72 96ms 7 Mar 2025 407th Blendi-Goose 904 72 4ms 16 Mar 2025 407th edsrzf 🇳🇿 904 72 5ms 12 Apr 2025 407th sean-niemann 🇺🇸 904 72 4ms 16 Oct 2025 417th stefangimmillaro 904 92 131ms 24 Oct 2023 417th inverseLorentz 🇦🇺 904 92 124ms 27 May 2024 417th sean-niemann 🇺🇸 904 92 124ms 8 Jun 2025 417th ian-h-chamberlain 🇺🇸 904 92 127ms 14 days ago 421st Steffan153 🇫🇮 903 82 44ms 1 Apr 2023 421st sean-niemann 🇺🇸 903 82 43ms 12 Jul 2024 423rd Lydxn 🇨🇦 902 69 7ms 12 Sep 2022 423rd GrayJoKing 🇦🇺 902 69 7ms 12 Sep 2022 423rd btnlq 902 69 7ms 24 Sep 2022 426th michael-pruglo 🇺🇦 902 94 55ms 5 Jul 2022 426th zygoloid 902 94 54ms 5 Aug 2024 428th Lydxn 🇨🇦 901 108 253ms 6 May 2022 428th CaedenHarper 🇨🇦 901 108 270ms 5 Oct 2025 430th SirBogman 🇺🇸 900 50 407ms 5 May 2022 430th nwellnhof 🇩🇪 900 50 402ms 3 Jun 2022 430th Lydxn 🇨🇦 900 50 413ms 15 Aug 2022 430th Steffan153 🇫🇮 900 50 390ms 9 Aug 2024 434th DialFrost 🇸🇬 899 69 88ms 15 Jul 2024 435th Lydxn 🇨🇦 898 48 249ms 5 May 2022 435th p-zubieta 898 48 259ms 6 Mar 2024 437th GrayJoKing 🇦🇺 898 70 2ms 6 May 2022 437th saito-ta 🇯🇵 898 70 3ms 21 Dec 2023 437th ovs-code 🇩🇪 898 70 2ms 17 Feb 2024 437th trinityy-7 898 70 2ms 7 Aug 2025 437th KasperKivimaeki 🇫🇮 898 70 6ms 8 Aug 2025 442nd Lydxn 🇨🇦 898 72 302ms 16 Jul 2023 443rd edsrzf 🇳🇿 898 78 12ms 26 Oct 2024 443rd kg583 🇺🇸 898 78 11ms 25 Sep 2025 445th GrayJoKing 🇦🇺 898 91 31ms 19 Jan 2023 446th DialFrost 🇸🇬 897 29 162ms 15 Mar 2025 447th Steffan153 🇫🇮 897 59 137ms 10 Aug 2024 447th rucin93 🇵🇱 897 59 136ms 13 Oct 2024 447th sean-niemann 🇺🇸 897 59 137ms 13 Oct 2024 447th lukegustafson 🇺🇸 897 59 135ms 24 Oct 2024 First Prev 376–450 of 3,509 Next Last