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 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 Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers 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 ><> ALGOL 68 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 ArkScript 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 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 ArkScript 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 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 Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers 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 631st OllieBoyne 🇬🇧 883 70 20ms 19 Jul 2022 631st wen1now 883 70 20ms 8 Aug 2022 631st 051 🇸🇬 883 70 19ms 8 Aug 2022 631st Sp3000 🇦🇺 883 70 21ms 8 Aug 2022 631st betaveros 883 70 19ms 9 Aug 2022 631st shelerr 883 70 20ms 9 Sep 2022 631st stewSquared 🇺🇸 883 70 20ms 27 Sep 2022 631st orthoplex 🇨🇽 883 70 24ms 9 Oct 2022 631st 5quiwyrm 883 70 18ms 19 Oct 2022 631st myfatemi04 883 70 20ms 4 Nov 2022 631st kevinmchung 883 70 19ms 4 Nov 2022 631st FlorianCassayre 🇫🇷 883 70 18ms 7 Nov 2022 631st fourth-bit 883 70 19ms 29 Nov 2022 631st QuincyNash 🇺🇸 883 70 20ms 29 Nov 2022 631st aksyristos 883 70 20ms 25 Dec 2022 631st thizanne 883 70 20ms 27 Dec 2022 631st Alex-x90 🇺🇸 883 70 20ms 20 Jan 2023 631st bob-th 883 70 20ms 24 Jan 2023 631st SirFireball3521 883 70 17ms 25 Jan 2023 631st stefangimmillaro 883 70 21ms 6 Feb 2023 631st FieryIceStickie 883 70 18ms 3 Apr 2023 631st MeWhenI 🇻🇦 883 70 19ms 30 Apr 2023 631st fgrosshans 🇫🇷 883 70 18ms 5 May 2023 631st Shanethegamer 🇺🇸 883 70 20ms 25 May 2023 631st InigoK 🇺🇸 883 70 20ms 14 Jun 2023 631st quimey 883 70 16ms 15 Jun 2023 631st CornerMercury 🇬🇧 883 70 20ms 19 Jun 2023 631st ndren 883 70 19ms 2 Aug 2023 631st janbehrens 🇩🇪 883 70 21ms 24 Nov 2023 631st namelessiw 883 70 19ms 9 Jan 2024 631st mathisfun271 883 70 20ms 13 Feb 2024 631st Just4FunCoder 883 70 20ms 17 Feb 2024 631st ThijsLuttikhuis 883 70 20ms 3 Mar 2024 631st elgan65536 🇺🇸 883 70 19ms 5 Mar 2024 631st jtaxen 883 70 19ms 1 Apr 2024 631st HumanoidCPU 883 70 19ms 6 May 2024 631st abc7-12 883 70 22ms 6 May 2024 631st ahmetdemirag 🇨🇾 883 70 20ms 9 Jun 2024 631st FranklinJiaChen 883 70 18ms 4 Jul 2024 631st 5cw 🇺🇸 883 70 21ms 13 Jul 2024 631st CaedenHarper 🇨🇦 883 70 21ms 3 Aug 2024 631st emgordon154 883 70 20ms 5 Aug 2024 631st dokutan 883 70 19ms 9 Aug 2024 631st jatloe 883 70 20ms 26 Aug 2024 631st lgrandco 883 70 18ms 9 Oct 2024 631st snydej 883 70 20ms 21 Nov 2024 631st erikji 883 70 20ms 4 Feb 2025 631st CutSandstone 883 70 20ms 4 Feb 2025 631st albanian-laundromat 883 70 18ms 12 Apr 2025 631st xsot 🇸🇬 883 70 23ms 3 May 2025 631st fuzzylojik-golf 🇺🇸 883 70 20ms 14 Jun 2025 631st smilesformiles3 883 70 21ms 14 Jun 2025 631st KasperKivimaeki 🇫🇮 883 70 20ms 30 Jun 2025 631st adaGrad1 883 70 19ms 10 Aug 2025 631st EthanJantz 883 70 19ms 10 Aug 2025 631st qpwoeirut 883 70 16ms 10 Aug 2025 631st katss2 883 70 19ms 17 Aug 2025 631st intgrah 883 70 20ms 23 Sep 2025 631st ryyyn 🇺🇸 883 70 19ms 29 Oct 2025 631st luuumine 🇫🇷 883 70 19ms 3 Nov 2025 631st Babafaba 883 70 20ms 7 Nov 2025 631st commandz0 🇺🇸 883 70 19ms 16 Nov 2025 631st hellopir2 883 70 22ms 23 Nov 2025 631st bzijlema 🇳🇱 883 70 20ms 3 Dec 2025 631st blaztoma 🇱🇹 883 70 21ms 19 days ago 631st firegene 🇮🇪 883 70 20ms 9 days ago 707th Shanethegamer 🇺🇸 882 51 511ms 15 May 2023 708th GrayJoKing 🇦🇺 882 60 160ms 24 Oct 2024 709th GrayJoKing 🇦🇺 882 84 35ms 19 Jun 2022 709th primo-ppcg 🇹🇭 882 84 36ms 29 Jun 2022 709th MeWhenI 🇻🇦 882 84 38ms 30 Dec 2025 712th primo-ppcg 🇹🇭 882 193 107ms 14 Aug 2025 713th Shanethegamer 🇺🇸 881 73 116ms 8 May 2025 713th DialFrost 🇸🇬 881 73 90ms 3 Jun 2025 713th edsrzf 🇳🇿 881 73 105ms 4 Jul 2025 716th Shanethegamer 🇺🇸 881 142 1,479ms 27 Mar 2025 716th DialFrost 🇸🇬 881 142 2,892ms 28 Mar 2025 716th emgordon154 881 142 1,432ms 10 Apr 2025 716th GolfingSuccess 🇬🇷 881 142 1,444ms 6 Dec 2025 720th JayXon 🇺🇸 881 158 1,772ms 14 Sep 2025 First Prev 641–720 of 3,615 Next Last