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 375th kg583 🇺🇸 908 83 42ms 14 Feb 2025 377th m-tkach 🇺🇦 908 90 30ms 7 Dec 2023 378th KrausRaus 🇺🇸 907 59 10ms 4 May 2022 378th voytxt 🇨🇿 907 59 9ms 4 May 2022 378th KingSkyrock 🇺🇸 907 59 9ms 18 May 2022 378th ZakkkkAttackkkk 🇵🇭 907 59 9ms 14 Jul 2022 378th aksyristos 907 59 11ms 28 Oct 2022 378th nstearns96 🇬🇧 907 59 10ms 28 Nov 2022 378th janbehrens 🇩🇪 907 59 9ms 17 May 2023 378th Shanethegamer 🇺🇸 907 59 10ms 25 May 2023 378th Maznek 907 59 10ms 26 Jun 2023 378th SpiritAxolotl 🇺🇸 907 59 10ms 20 Mar 2024 378th Andrey-Plotnikov 907 59 9ms 19 May 2024 378th emgordon154 907 59 10ms 5 Aug 2024 378th duckyluuk 🇳🇱 907 59 10ms 3 Oct 2024 378th lifthrasiir 🇰🇷 907 59 10ms 23 Nov 2024 378th fuzzylojik-golf 🇺🇸 907 59 10ms 1 Jun 2025 378th acollett89 907 59 10ms 17 Jun 2025 378th iczelia 🇩🇪 907 59 10ms 23 Sep 2025 395th nipzu 906 48 48ms 8 Sep 2024 396th Steffan153 🇫🇮 906 80 26ms 15 Nov 2022 396th error256 906 80 115ms 8 Apr 2025 398th Shanethegamer 🇺🇸 906 82 17ms 19 Dec 2023 398th edsrzf 🇳🇿 906 82 17ms 6 Jan 2025 400th krcs 🇵🇱 906 86 372ms 10 May 2022 400th billings7 🇬🇧 906 86 347ms 15 May 2022 400th revlayle 🇺🇸 906 86 337ms 7 Dec 2022 400th Widgitty 906 86 319ms 1 Sep 2023 400th albanian-laundromat 906 86 383ms 30 Sep 2025 405th shinh 905 52 36ms 29 Jun 2022 406th Lydxn 🇨🇦 905 64 181ms 1 Apr 2023 407th Lydxn 🇨🇦 905 70 84ms 7 May 2022 408th MeWhenI 🇻🇦 905 71 102ms 20 Aug 2024 409th Shanethegamer 🇺🇸 904 72 3ms 4 May 2022 409th jared-hughes 904 72 4ms 4 May 2022 409th Waffle3z 904 72 4ms 5 May 2022 409th m-tkach 🇺🇦 904 72 97ms 16 Oct 2022 409th GrayJoKing 🇦🇺 904 72 102ms 22 Oct 2022 409th emplv 🇱🇻 904 72 100ms 27 Oct 2022 409th sean-niemann 🇺🇸 904 72 96ms 7 Mar 2025 409th Blendi-Goose 904 72 4ms 16 Mar 2025 409th edsrzf 🇳🇿 904 72 5ms 12 Apr 2025 409th sean-niemann 🇺🇸 904 72 3ms 16 Oct 2025 419th stefangimmillaro 904 92 131ms 24 Oct 2023 419th inverseLorentz 🇦🇺 904 92 128ms 27 May 2024 419th sean-niemann 🇺🇸 904 92 125ms 8 Jun 2025 419th ian-h-chamberlain 🇺🇸 904 92 123ms 19 days ago 423rd Steffan153 🇫🇮 903 82 42ms 1 Apr 2023 423rd sean-niemann 🇺🇸 903 82 42ms 12 Jul 2024 425th Lydxn 🇨🇦 902 69 7ms 12 Sep 2022 425th GrayJoKing 🇦🇺 902 69 7ms 12 Sep 2022 425th btnlq 902 69 7ms 24 Sep 2022 428th michael-pruglo 🇺🇦 902 94 55ms 5 Jul 2022 428th zygoloid 902 94 53ms 5 Aug 2024 430th SirBogman 🇺🇸 900 50 402ms 5 May 2022 430th nwellnhof 🇩🇪 900 50 397ms 3 Jun 2022 430th Lydxn 🇨🇦 900 50 404ms 15 Aug 2022 430th Steffan153 🇫🇮 900 50 408ms 9 Aug 2024 434th Lydxn 🇨🇦 900 72 291ms 16 Jul 2023 435th DialFrost 🇸🇬 899 69 96ms 15 Jul 2024 436th Lydxn 🇨🇦 898 48 249ms 5 May 2022 436th p-zubieta 898 48 259ms 6 Mar 2024 438th GrayJoKing 🇦🇺 898 70 3ms 6 May 2022 438th saito-ta 🇯🇵 898 70 2ms 21 Dec 2023 438th ovs-code 🇩🇪 898 70 2ms 17 Feb 2024 438th trinityy-7 898 70 2ms 7 Aug 2025 438th KasperKivimaeki 🇫🇮 898 70 6ms 8 Aug 2025 443rd edsrzf 🇳🇿 898 78 11ms 26 Oct 2024 443rd kg583 🇺🇸 898 78 12ms 25 Sep 2025 445th GrayJoKing 🇦🇺 898 91 29ms 19 Jan 2023 446th DialFrost 🇸🇬 897 29 176ms 15 Mar 2025 447th Steffan153 🇫🇮 897 59 131ms 10 Aug 2024 447th rucin93 🇵🇱 897 59 132ms 13 Oct 2024 447th sean-niemann 🇺🇸 897 59 134ms 13 Oct 2024 447th lukegustafson 🇺🇸 897 59 133ms 24 Oct 2024 First Prev 376–450 of 3,516 Next Last