Collatz in JavaScript 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 NFA Simulator 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 NFA Simulator 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 149th amiralitaheri 873 63 10ms 23 Feb 2023 149th RuyiLi 873 63 10ms 1 Apr 2023 149th TaserTheFox 🇺🇸 873 63 10ms 25 May 2023 149th pfysches-boop 873 63 10ms 6 Aug 2023 149th mhgockel 873 63 10ms 19 Aug 2023 149th NickTheEASDude 🇺🇸 873 63 10ms 18 Jan 2024 149th 823126 873 63 11ms 14 Nov 2024 149th Palladium02 873 63 9ms 12 May 2025 149th 4very 873 63 10ms 10 Jun 2025 149th Ultra814 873 63 9ms 21 Aug 2025 161st elisherer 🇮🇱 859 64 9ms 5 Jun 2022 161st Ashikpaul 🇮🇳 859 64 12ms 29 Jul 2022 161st LukeBridges 🇬🇧 859 64 10ms 26 Oct 2022 161st florton 859 64 10ms 18 Jan 2023 161st DayDun 🇸🇪 859 64 10ms 24 Jan 2023 161st lyphyser 859 64 11ms 3 Jun 2023 161st Davr1 🇨🇿 859 64 10ms 14 Oct 2023 161st stellartux 859 64 11ms 26 Dec 2023 161st goodwyna21 859 64 11ms 12 Nov 2024 161st xShadowBlade 859 64 11ms 26 Dec 2024 161st richard-oelze 🇩🇪 859 64 10ms 4 Aug 2025 172nd wansacis 🇩🇪 846 65 9ms 13 May 2022 172nd krcs 🇵🇱 846 65 10ms 24 Nov 2022 172nd ejini6969 846 65 9ms 1 Apr 2023 172nd InspectorBoat 846 65 10ms 25 Oct 2023 172nd jake6192 846 65 10ms 20 May 2025 172nd LordSir101 846 65 10ms 11 Aug 2025 178th ChiefChippy2 833 66 10ms 4 May 2022 178th Radwatch 833 66 10ms 22 Jun 2022 178th TheCod-r 🇦🇶 833 66 9ms 10 Oct 2022 178th MadScience137 833 66 10ms 17 Oct 2022 178th nayakrujul 833 66 11ms 12 Mar 2023 178th HenryTy83 833 66 10ms 3 May 2023 178th charliegaming 833 66 11ms 3 Oct 2023 178th mobibluman 833 66 11ms 16 Oct 2023 178th azka1368 833 66 10ms 23 Nov 2023 178th thej10n 833 66 10ms 13 Jun 2024 178th Florian-Mt 833 66 10ms 22 Jul 2024 178th deancureton 833 66 9ms 29 Dec 2024 178th Quadruplay 833 66 10ms 12 Jul 2025 191st inverseLorentz 🇦🇺 821 67 10ms 25 Jun 2022 191st maxpelic 🇺🇸 821 67 11ms 5 Jul 2022 191st vroup 🇩🇰 821 67 10ms 29 Sep 2022 191st Bodo171 821 67 10ms 1 Dec 2022 191st Inbarw100 821 67 10ms 10 Jun 2023 191st raszpi 🇭🇺 821 67 11ms 1 Sep 2023 191st dijs 821 67 10ms 8 Mar 2024 191st yb1yb1 821 67 9ms 6 Oct 2024 191st smclaughlin-cf 821 67 11ms 25 Feb 2025 191st 52525rr 821 67 10ms 20 Oct 2025 201st Smetalo 809 68 10ms 25 Aug 2022 201st TheRealOhead 🇺🇸 809 68 10ms 23 Nov 2022 201st b10011 🇫🇮 809 68 10ms 27 Dec 2022 201st RasmusBV 809 68 11ms 19 Feb 2023 201st joakim-ronning 809 68 10ms 24 May 2023 201st TRexOnGit 809 68 9ms 31 Jan 2024 207th adoxography 797 69 10ms 13 Jul 2022 207th eshilo-draper 797 69 10ms 5 Oct 2022 207th 2pichar 797 69 10ms 11 Nov 2022 207th jorbDehmel 🇺🇸 797 69 10ms 17 Jun 2023 211th Jaro32768 🇸🇰 786 70 10ms 8 Feb 2024 211th Alex-Huggett 🇬🇧 786 70 9ms 15 Apr 2024 211th Moreallure 786 70 10ms 5 May 2024 211th AnnoyedArt1256 786 70 10ms 3 Jul 2025 215th destofr 775 71 9ms 25 Aug 2022 215th pyuraii 775 71 10ms 27 Sep 2022 215th kydogia 775 71 10ms 18 Oct 2022 215th jquade7 775 71 10ms 27 May 2023 215th SniperSmiley 🇺🇸 775 71 10ms 7 Apr 2024 215th dbkirk4211 775 71 10ms 3 May 2024 221st coolCucumber-cat 764 72 9ms 20 Mar 2023 221st mrmena 🇦🇺 764 72 10ms 19 Mar 2024 221st sulphemi 764 72 10ms 3 Apr 2025 224th gurglemurgle5 753 73 11ms 12 May 2022 224th adamnielson42 🇺🇸 753 73 12ms 24 Apr 2023 First Prev 151–225 of 270 Next Last