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 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 NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 Erlang 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 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 Erlang 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 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 NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Bytes Time Submitted 591st OllieBoyne 🇬🇧 883 70 19ms 19 Jul 2022 591st bricknellj 883 70 17ms 25 Jul 2022 591st wen1now 883 70 21ms 8 Aug 2022 591st 051 🇸🇬 883 70 23ms 8 Aug 2022 591st Sp3000 🇦🇺 883 70 25ms 8 Aug 2022 591st betaveros 883 70 18ms 9 Aug 2022 591st shelerr 883 70 20ms 9 Sep 2022 591st stewSquared 🇺🇸 883 70 30ms 27 Sep 2022 591st orthoplex 🇨🇽 883 70 24ms 9 Oct 2022 591st 5quiwyrm 883 70 21ms 19 Oct 2022 591st myfatemi04 883 70 18ms 4 Nov 2022 591st kevinmchung 883 70 19ms 4 Nov 2022 591st FlorianCassayre 🇫🇷 883 70 19ms 7 Nov 2022 591st fourth-bit 883 70 21ms 29 Nov 2022 591st QuincyNash 🇺🇸 883 70 19ms 29 Nov 2022 591st aksyristos 883 70 31ms 25 Dec 2022 591st thizanne 883 70 19ms 27 Dec 2022 591st Alex-x90 🇺🇸 883 70 26ms 20 Jan 2023 591st bob-th 883 70 20ms 24 Jan 2023 591st SirFireball3521 883 70 19ms 25 Jan 2023 591st stefangimmillaro 883 70 20ms 6 Feb 2023 591st Seek64 🇩🇪 883 70 17ms 7 Feb 2023 591st FieryIceStickie 883 70 19ms 3 Apr 2023 591st MeWhenI 🇻🇦 883 70 18ms 30 Apr 2023 591st fgrosshans 🇫🇷 883 70 20ms 5 May 2023 591st Shanethegamer 🇺🇸 883 70 21ms 25 May 2023 591st InigoK 🇺🇸 883 70 18ms 14 Jun 2023 591st quimey 883 70 16ms 15 Jun 2023 591st CornerMercury 🇬🇧 883 70 20ms 19 Jun 2023 591st ndren 883 70 19ms 2 Aug 2023 591st janbehrens 🇩🇪 883 70 19ms 24 Nov 2023 591st namelessiw 883 70 19ms 9 Jan 2024 591st mathisfun271 883 70 18ms 13 Feb 2024 591st Just4FunCoder 883 70 19ms 17 Feb 2024 591st ThijsLuttikhuis 883 70 26ms 3 Mar 2024 591st elgan65536 883 70 20ms 5 Mar 2024 591st jtaxen 883 70 22ms 1 Apr 2024 591st HumanoidCPU 883 70 29ms 6 May 2024 591st abc7-12 883 70 18ms 6 May 2024 591st ahmetdemirag 🇨🇾 883 70 19ms 9 Jun 2024 591st FranklinJiaChen 883 70 19ms 4 Jul 2024 591st 5cw 🇺🇸 883 70 18ms 13 Jul 2024 591st CaedenHarper 🇨🇦 883 70 18ms 3 Aug 2024 591st emgordon154 883 70 26ms 5 Aug 2024 591st dokutan 883 70 19ms 9 Aug 2024 591st jatloe 883 70 19ms 26 Aug 2024 591st lgrandco 883 70 18ms 9 Oct 2024 591st snydej 883 70 19ms 21 Nov 2024 591st erikji 883 70 19ms 4 Feb 2025 591st CutSandstone 883 70 20ms 4 Feb 2025 591st albanian-laundromat 883 70 18ms 12 Apr 2025 591st xsot 🇸🇬 883 70 20ms 3 May 2025 591st fuzzylojik-golf 🇺🇸 883 70 19ms 14 Jun 2025 591st smilesformiles3 883 70 22ms 14 Jun 2025 591st KasperKivimaeki 🇫🇮 883 70 19ms 30 Jun 2025 591st adaGrad1 883 70 20ms 10 Aug 2025 591st EthanJantz 883 70 18ms 10 Aug 2025 591st qpwoeirut 883 70 16ms 10 Aug 2025 591st katss2 883 70 19ms 17 Aug 2025 591st intgrah 883 70 22ms 23 Sep 2025 591st ryyyn 🇺🇸 883 70 20ms 26 days ago 591st luuumine 🇫🇷 883 70 19ms 22 days ago 591st Babafaba 883 70 18ms 18 days ago 591st commandblockguy 🇺🇸 883 70 22ms 9 days ago 591st hellopir2 883 70 18ms 2 days ago 666th Irratix 🇳🇱 883 96 55ms 4 May 2022 666th MeWhenI 🇻🇦 883 96 53ms 1 Jun 2022 666th janbehrens 🇩🇪 883 96 54ms 21 Apr 2023 666th Shanethegamer 🇺🇸 883 96 57ms 15 May 2023 666th Yewzir 🇧🇪 883 96 55ms 11 Nov 2023 666th MateuszPietrzak 🇵🇱 883 96 55ms 18 Nov 2023 666th kkoenig 883 96 54ms 21 Dec 2023 666th BlankSpruce 883 96 54ms 20 Aug 2024 666th fuzzylojik-golf 🇺🇸 883 96 55ms 14 Jun 2025 675th Shanethegamer 🇺🇸 882 51 420ms 15 May 2023 First Prev 601–675 of 3,485 Next Last