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 640th GolfingSuccess 🇬🇷 885 109 340ms 6 Sep 2025 640th edsrzf 🇳🇿 885 109 330ms 10 days ago 643rd MichalMarsalek 🇨🇿 884 70 22ms 5 May 2022 643rd primo-ppcg 🇹🇭 884 70 26ms 5 May 2022 643rd SirBogman 🇺🇸 884 70 23ms 5 May 2022 643rd prplz 🇦🇺 884 70 20ms 5 May 2022 643rd Irratix 🇳🇱 884 70 18ms 7 May 2022 643rd rak1507 🇬🇧 884 70 20ms 7 May 2022 643rd inventshah 884 70 17ms 9 May 2022 643rd k3w1k0d3r 884 70 19ms 22 Jun 2022 643rd ZakkkkAttackkkk 🇵🇭 884 70 19ms 14 Jul 2022 643rd Bonjour27891 🇻🇳 884 70 20ms 14 Jul 2022 643rd OllieBoyne 🇬🇧 884 70 21ms 19 Jul 2022 643rd wen1now 884 70 21ms 8 Aug 2022 643rd 051 🇸🇬 884 70 20ms 8 Aug 2022 643rd Sp3000 🇦🇺 884 70 22ms 8 Aug 2022 643rd betaveros 884 70 19ms 9 Aug 2022 643rd shelerr 884 70 19ms 9 Sep 2022 643rd stewSquared 🇺🇸 884 70 23ms 27 Sep 2022 643rd orthoplex 🇨🇽 884 70 24ms 9 Oct 2022 643rd 5quiwyrm 884 70 21ms 19 Oct 2022 643rd myfatemi04 884 70 20ms 4 Nov 2022 643rd kevinmchung 884 70 19ms 4 Nov 2022 643rd FlorianCassayre 🇫🇷 884 70 19ms 7 Nov 2022 643rd fourth-bit 884 70 19ms 29 Nov 2022 643rd QuincyNash 🇺🇸 884 70 19ms 29 Nov 2022 643rd aksyristos 884 70 20ms 25 Dec 2022 643rd thizanne 884 70 20ms 27 Dec 2022 643rd Alex-x90 🇺🇸 884 70 20ms 20 Jan 2023 643rd bob-th 884 70 19ms 24 Jan 2023 643rd SirFireball3521 884 70 18ms 25 Jan 2023 643rd stefangimmillaro 884 70 22ms 6 Feb 2023 643rd FieryIceStickie 884 70 20ms 3 Apr 2023 643rd MeWhenI 🇻🇦 884 70 19ms 30 Apr 2023 643rd fgrosshans 🇫🇷 884 70 19ms 5 May 2023 643rd Shanethegamer 🇺🇸 884 70 20ms 25 May 2023 643rd InigoK 🇺🇸 884 70 21ms 14 Jun 2023 643rd quimey 884 70 16ms 15 Jun 2023 643rd CornerMercury 🇬🇧 884 70 21ms 19 Jun 2023 643rd ndren 884 70 21ms 2 Aug 2023 643rd janbehrens 🇩🇪 884 70 21ms 24 Nov 2023 643rd namelessiw 884 70 19ms 9 Jan 2024 643rd mathisfun271 884 70 20ms 13 Feb 2024 643rd Just4FunCoder 884 70 20ms 17 Feb 2024 643rd ThijsLuttikhuis 884 70 22ms 3 Mar 2024 643rd elgan65536 🇺🇸 884 70 20ms 5 Mar 2024 643rd jtaxen 884 70 23ms 1 Apr 2024 643rd HumanoidCPU 884 70 21ms 6 May 2024 643rd abc7-12 884 70 20ms 6 May 2024 643rd ahmetdemirag 🇨🇾 884 70 19ms 9 Jun 2024 643rd FranklinJiaChen 884 70 20ms 4 Jul 2024 643rd 5cw 🇺🇸 884 70 20ms 13 Jul 2024 643rd emgordon154 884 70 25ms 5 Aug 2024 643rd dokutan 884 70 19ms 9 Aug 2024 643rd jatloe 884 70 18ms 26 Aug 2024 643rd lgrandco 884 70 21ms 9 Oct 2024 643rd snydej 884 70 21ms 21 Nov 2024 643rd erikji 884 70 21ms 4 Feb 2025 643rd CutSandstone 884 70 19ms 4 Feb 2025 643rd albanian-laundromat 🇺🇸 884 70 21ms 12 Apr 2025 643rd xsot 🇸🇬 884 70 23ms 3 May 2025 643rd fuzzylojik-golf 🇺🇸 884 70 21ms 14 Jun 2025 643rd smilesformiles3 884 70 22ms 14 Jun 2025 643rd KasperKivimaeki 🇫🇮 884 70 20ms 30 Jun 2025 643rd adaGrad1 884 70 20ms 10 Aug 2025 643rd EthanJantz 884 70 21ms 10 Aug 2025 643rd qpwoeirut 884 70 16ms 10 Aug 2025 643rd katss2 884 70 19ms 17 Aug 2025 643rd intgrah 884 70 21ms 23 Sep 2025 643rd ryyyn 🇺🇸 884 70 23ms 29 Oct 2025 643rd luuumine 🇫🇷 884 70 20ms 3 Nov 2025 643rd Babafaba 884 70 19ms 7 Nov 2025 643rd commandz0 🇺🇸 884 70 20ms 16 Nov 2025 643rd hellopir2 884 70 20ms 23 Nov 2025 643rd bzijlema 🇳🇱 884 70 21ms 3 Dec 2025 643rd blaztoma 🇱🇹 884 70 23ms 16 Feb 2026 643rd firegene 🇮🇪 884 70 21ms 25 Feb 2026 643rd Googolplexo 🇷🇺 884 70 19ms 21 days ago 643rd edsrzf 🇳🇿 884 70 23ms 10 days ago 643rd Mikey-Beep 🇬🇧 884 70 31ms 7 days ago First Prev 641–720 of 3,760 Next Last