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 Gray Code Decoder Gray Code Encoder 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 Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript 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 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 ArkScript 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 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 Gray Code Decoder Gray Code Encoder 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 Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 151st daniel-cardone 939 57 12ms 3 Jul 2025 151st CaedenHarper 🇨🇦 939 57 11ms 28 Sep 2025 151st BrunoVisnadi 🇧🇷 939 57 10ms 21 Oct 2025 151st Laellekoenig 939 57 11ms 22 Oct 2025 151st madex 🇩🇪 939 57 10ms 15 Mar 2026 166th Irratix 🇳🇱 939 83 388ms 4 May 2022 166th nwellnhof 🇩🇪 939 83 383ms 4 May 2022 166th ScottHamper 939 83 380ms 5 May 2022 166th Romain-1 🇫🇷 939 83 381ms 1 Jun 2022 166th Gaddy 🇫🇷 939 83 359ms 1 Jun 2022 166th 5quiwyrm 939 83 379ms 4 Sep 2022 166th Betuaredead 939 83 376ms 5 Jan 2023 166th Yewzir 🇧🇪 939 83 365ms 12 Feb 2023 166th btnlq 939 83 388ms 9 Mar 2023 166th Adix-null 🇱🇹 939 83 385ms 17 May 2023 166th AdrienHache 🇫🇷 939 83 395ms 8 Jun 2023 166th gblikas 939 83 412ms 23 Jul 2023 166th KrausRaus 🇺🇸 939 83 392ms 31 Jul 2023 166th namelessiw 939 83 379ms 9 Apr 2025 166th dokutan 939 83 387ms 9 Apr 2025 166th m-tkach 🇺🇦 939 83 389ms 10 Apr 2025 166th DialFrost 🇸🇬 939 83 401ms 10 Apr 2025 166th kylejcwu 939 83 374ms 19 Apr 2025 166th Tyrant7 939 83 381ms 19 Apr 2025 166th Yax42 🇫🇷 939 83 394ms 19 Apr 2025 166th MeWhenI 🇻🇦 939 83 378ms 19 Jun 2025 166th sean-niemann 🇺🇸 939 83 390ms 20 Jun 2025 166th stefangimmillaro 939 83 372ms 20 Jun 2025 166th tomh1012 939 83 376ms 28 Aug 2025 166th fuzzylojik-golf 🇻🇦 939 83 389ms 8 Sep 2025 166th CaedenHarper 🇨🇦 939 83 377ms 17 Oct 2025 166th arcpolaris 939 83 396ms 13 Jan 2026 166th amazingalek 🇳🇴 939 83 403ms 21 Jan 2026 194th grey0ut 938 48 2,086ms 8 Apr 2025 195th JayXon 🇺🇸 937 66 1,468ms 18 Nov 2025 196th DialFrost 🇸🇬 937 89 441ms 24 Sep 2025 196th ovs-code 🇩🇪 937 89 454ms 24 Sep 2025 196th dokutan 937 89 372ms 24 Sep 2025 196th sean-niemann 🇺🇸 937 89 397ms 24 Sep 2025 196th Shanethegamer 🇺🇸 937 89 477ms 25 Sep 2025 196th nwellnhof 🇩🇪 937 89 454ms 25 Sep 2025 196th m-tkach 🇺🇦 937 89 386ms 25 Sep 2025 196th namelessiw 937 89 390ms 2 Oct 2025 196th Yewzir 🇧🇪 937 89 349ms 2 Oct 2025 196th Yax42 🇫🇷 937 89 467ms 4 Oct 2025 196th stefangimmillaro 937 89 428ms 6 Oct 2025 196th CaedenHarper 🇨🇦 937 89 467ms 9 Oct 2025 196th Jacob385 937 89 425ms 27 Oct 2025 196th MeWhenI 🇻🇦 937 89 449ms 7 Nov 2025 196th ethanlally 937 89 380ms 10 Nov 2025 196th snoozingnewt 🇨🇦 937 89 384ms 23 Nov 2025 196th ScottHamper 937 89 467ms 30 Nov 2025 196th KasperKivimaeki 🇫🇮 937 89 444ms 30 Nov 2025 214th JayXon 🇺🇸 936 73 4ms 23 Dec 2025 215th vang1ong7ang 935 89 134ms 6 days ago 216th nwellnhof 🇩🇪 934 42 380ms 4 May 2022 216th Lydxn 🇨🇦 934 42 1,594ms 4 May 2022 216th GrayJoKing 🇦🇺 934 42 396ms 4 May 2022 216th Steffan153 🇫🇮 934 42 387ms 16 Dec 2022 216th sisyphus-ppcg 🇦🇺 934 42 387ms 31 Jan 2023 216th ovs-code 🇩🇪 934 42 379ms 30 Dec 2023 216th sean-niemann 🇺🇸 934 42 385ms 8 Mar 2025 223rd emplv 🇱🇻 934 60 9ms 5 May 2022 223rd GrayJoKing 🇦🇺 934 60 12ms 6 May 2022 223rd targrik 934 60 10ms 24 Dec 2024 223rd xsot 🇸🇬 934 60 12ms 1 May 2025 227th m-tkach 🇺🇦 934 91 59ms 5 May 2022 227th 09cf 934 91 59ms 4 Oct 2023 229th Steffan153 🇫🇮 933 51 1,122ms 26 days ago 230th GrayJoKing 🇦🇺 933 56 470ms 15 Jan 2024 230th AlephSquirrel 933 56 419ms 21 Jan 2024 230th CaedenHarper 🇨🇦 933 56 476ms 26 Jan 2026 233rd MeWhenI 🇻🇦 933 68 98ms 23 Feb 2023 233rd JayXon 🇺🇸 933 68 98ms 4 Mar 2025 235th ovs-code 🇩🇪 932 60 5ms 9 Oct 2023 235th GrayJoKing 🇦🇺 932 60 4ms 11 Oct 2023 235th Lydxn 🇨🇦 932 60 5ms 11 Oct 2023 235th GolfingSuccess 🇬🇷 932 60 4ms 16 Nov 2023 235th Steffan153 🇫🇮 932 60 5ms 28 Jan 2024 235th JayXon 🇺🇸 932 60 4ms 29 Jan 2024 First Prev 161–240 of 3,765 Next Last