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 148th Romain-1 🇫🇷 938 83 331ms 1 Jun 2022 148th Gaddy 🇫🇷 938 83 365ms 1 Jun 2022 148th 5quiwyrm 938 83 372ms 4 Sep 2022 148th Betuaredead 938 83 357ms 5 Jan 2023 148th Yewzir 🇧🇪 938 83 340ms 12 Feb 2023 148th btnlq 938 83 340ms 9 Mar 2023 148th Adix-null 🇱🇹 938 83 372ms 17 May 2023 148th AdrienHache 🇫🇷 938 83 379ms 8 Jun 2023 148th gblikas 938 83 448ms 23 Jul 2023 148th KrausRaus 🇺🇸 938 83 353ms 31 Jul 2023 148th namelessiw 938 83 374ms 9 Apr 2025 148th dokutan 938 83 362ms 9 Apr 2025 148th m-tkach 🇺🇦 938 83 383ms 10 Apr 2025 148th DialFrost 🇸🇬 938 83 386ms 10 Apr 2025 148th Pecanolith 938 83 383ms 19 Apr 2025 148th Tyrant7 938 83 393ms 19 Apr 2025 148th Yax42 🇫🇷 938 83 381ms 19 Apr 2025 148th MeWhenI 🇻🇦 938 83 344ms 19 Jun 2025 148th sean-niemann 🇺🇸 938 83 346ms 20 Jun 2025 148th stefangimmillaro 938 83 389ms 20 Jun 2025 148th tomh1012 938 83 451ms 28 Aug 2025 148th fuzzylojik-golf 🇺🇸 938 83 363ms 8 Sep 2025 148th CaedenHarper 🇨🇦 938 83 357ms 17 Oct 2025 174th grey0ut 937 48 2,043ms 8 Apr 2025 175th GolfingSuccess 🇬🇷 937 49 38ms 12 Aug 2024 175th Shanethegamer 🇺🇸 937 49 39ms 12 Aug 2024 175th Steffan153 🇫🇮 937 49 39ms 12 Aug 2024 175th MeWhenI 🇻🇦 937 49 37ms 13 Aug 2024 175th DialFrost 🇸🇬 937 49 39ms 13 Aug 2024 175th GrayJoKing 🇦🇺 937 49 41ms 15 Aug 2024 175th btnlq 937 49 39ms 16 Aug 2024 175th emgordon154 937 49 41ms 19 Aug 2024 175th ovs-code 🇩🇪 937 49 39ms 19 Aug 2024 175th mousetail 🇳🇱 937 49 42ms 13 Sep 2024 175th lynn 937 49 40ms 20 Dec 2024 175th weeble 937 49 40ms 20 Dec 2024 175th sean-niemann 🇺🇸 937 49 40ms 11 Jan 2025 188th JayXon 🇺🇸 937 66 1,300ms 24 days ago 189th DialFrost 🇸🇬 937 89 402ms 24 Sep 2025 189th ovs-code 🇩🇪 937 89 448ms 24 Sep 2025 189th dokutan 937 89 417ms 24 Sep 2025 189th sean-niemann 🇺🇸 937 89 456ms 24 Sep 2025 189th Shanethegamer 🇺🇸 937 89 438ms 25 Sep 2025 189th nwellnhof 🇩🇪 937 89 429ms 25 Sep 2025 189th m-tkach 🇺🇦 937 89 415ms 25 Sep 2025 189th namelessiw 937 89 456ms 2 Oct 2025 189th Yewzir 🇧🇪 937 89 695ms 2 Oct 2025 189th Yax42 🇫🇷 937 89 422ms 4 Oct 2025 189th stefangimmillaro 937 89 428ms 6 Oct 2025 189th CaedenHarper 🇨🇦 937 89 433ms 9 Oct 2025 189th Jacob385 937 89 452ms 27 Oct 2025 189th MeWhenI 🇻🇦 937 89 416ms 7 Nov 2025 189th ethanlally 937 89 433ms 10 Nov 2025 189th snoozingnewt 🇨🇦 937 89 394ms 19 days ago 189th ScottHamper 937 89 436ms 12 days ago 189th KasperKivimaeki 🇫🇮 937 89 368ms 11 days ago 207th nwellnhof 🇩🇪 933 42 403ms 4 May 2022 207th Lydxn 🇨🇦 933 42 2,884ms 4 May 2022 207th GrayJoKing 🇦🇺 933 42 366ms 4 May 2022 207th Steffan153 🇫🇮 933 42 368ms 16 Dec 2022 207th sisyphus-ppcg 🇦🇺 933 42 383ms 31 Jan 2023 207th ovs-code 🇩🇪 933 42 379ms 30 Dec 2023 207th sean-niemann 🇺🇸 933 42 507ms 8 Mar 2025 214th emplv 🇱🇻 933 60 9ms 5 May 2022 214th GrayJoKing 🇦🇺 933 60 10ms 6 May 2022 214th targrik 933 60 10ms 24 Dec 2024 214th xsot 🇸🇬 933 60 9ms 1 May 2025 218th m-tkach 🇺🇦 932 91 55ms 5 May 2022 218th 09cf 932 91 53ms 4 Oct 2023 220th GrayJoKing 🇦🇺 931 56 411ms 15 Jan 2024 220th AlephSquirrel 931 56 426ms 21 Jan 2024 222nd MeWhenI 🇻🇦 931 68 90ms 23 Feb 2023 222nd JayXon 🇺🇸 931 68 92ms 4 Mar 2025 224th ovs-code 🇩🇪 930 60 4ms 9 Oct 2023 224th GrayJoKing 🇦🇺 930 60 4ms 11 Oct 2023 First Prev 151–225 of 3,518 Next Last