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 321st arctouch-cristiannevianna 917 85 391ms 3 Apr 2023 321st tomtheisen 🇺🇸 917 85 422ms 10 Apr 2025 323rd Shanethegamer 🇺🇸 917 87 461ms 15 May 2023 323rd JayXon 🇺🇸 917 87 481ms 15 May 2023 323rd Steffan153 🇫🇮 917 87 460ms 16 May 2023 323rd Lydxn 🇨🇦 917 87 456ms 16 May 2023 323rd GrayJoKing 🇦🇺 917 87 461ms 11 Aug 2023 323rd sean-niemann 🇺🇸 917 87 468ms 11 Jul 2024 329th Shanethegamer 🇺🇸 916 61 5ms 9 Oct 2023 330th Mukundan314 916 67 609ms 25 Dec 2025 331st kmathis22 916 91 370ms 20 Nov 2025 332nd Natanaelel 🇸🇪 915 57 459ms 17 Jan 2024 332nd Kacarott 🇦🇺 915 57 402ms 10 Sep 2024 334th ovs-code 🇩🇪 915 75 67ms 12 Sep 2024 334th Kacarott 🇦🇺 915 75 62ms 13 Sep 2024 336th Lydxn 🇨🇦 915 81 39ms 1 Apr 2023 337th andersk 🇺🇸 914 91 130ms 25 Oct 2022 337th Super-Pizza 🇨🇦 914 91 131ms 4 Dec 2022 337th klixel 🇨🇦 914 91 128ms 20 May 2023 337th lynn 914 91 139ms 6 Jul 2024 337th edsrzf 🇳🇿 914 91 134ms 29 Nov 2024 337th DialFrost 🇸🇬 914 91 130ms 7 Apr 2025 337th elgan65536 🇺🇸 914 91 131ms 10 Feb 2026 337th fantaize 914 91 126ms 42 mins ago 345th lynn 913 78 1,382ms 5 May 2022 346th tailorspy 913 93 55ms 27 May 2024 346th sean-niemann 🇺🇸 913 93 57ms 9 Jun 2025 346th KasperKivimaeki 🇫🇮 913 93 56ms 26 Oct 2025 349th nai62 912 69 7ms 27 Aug 2022 350th GrayJoKing 🇦🇺 912 71 321ms 10 Aug 2023 351st GolfingSuccess 🇬🇷 910 64 91ms 14 Dec 2024 351st MeWhenI 🇻🇦 910 64 91ms 24 Dec 2024 351st GrayJoKing 🇦🇺 910 64 90ms 25 Nov 2025 354th edsrzf 🇳🇿 910 72 128ms 3 Jul 2025 355th sean-niemann 🇺🇸 910 75 5ms 23 Dec 2025 355th Steffan153 🇫🇮 910 75 5ms 27 days ago 357th Shanethegamer 🇺🇸 910 77 14ms 15 May 2023 358th primo-ppcg 🇹🇭 910 93 30ms 7 May 2022 358th AlephSquirrel 910 93 26ms 21 Jan 2023 358th kg583 🇺🇸 910 93 29ms 26 Dec 2024 358th CLOStrophobic 🇮🇹 910 93 30ms 17 Jan 2025 358th edsrzf 🇳🇿 910 93 30ms 3 Jul 2025 363rd Betuaredead 909 60 4ms 5 Jan 2023 363rd Yewzir 🇧🇪 909 60 4ms 12 Feb 2023 363rd Steffan153 🇫🇮 909 60 4ms 23 Feb 2023 363rd GolfingSuccess 🇬🇷 909 60 4ms 16 Oct 2024 363rd sean-niemann 🇺🇸 909 60 9ms 7 Mar 2025 368th MeWhenI 🇻🇦 909 63 184ms 5 May 2022 369th Lydxn 🇨🇦 909 68 463ms 5 May 2022 369th GrayJoKing 🇦🇺 909 68 15ms 15 Nov 2022 369th Bubbler-4 909 68 15ms 15 Nov 2022 369th Rubiksmath 909 68 15ms 14 Aug 2023 369th Languag3 909 68 16ms 9 days ago 374th marshallward 🇺🇸 909 83 40ms 10 May 2022 375th ovs-code 🇩🇪 909 84 65ms 25 Sep 2022 375th GrayJoKing 🇦🇺 909 84 65ms 11 Aug 2023 375th edsrzf 🇳🇿 909 84 65ms 12 Nov 2025 375th Steffan153 🇫🇮 909 84 68ms 11 days ago 379th m-tkach 🇺🇦 909 90 31ms 7 Dec 2023 380th edsrzf 🇳🇿 908 83 41ms 14 Jan 2025 380th kg583 🇺🇸 908 83 42ms 14 Feb 2025 382nd KrausRaus 🇺🇸 907 59 11ms 4 May 2022 382nd voytxt 🇨🇿 907 59 14ms 4 May 2022 382nd KingSkyrock 🇺🇸 907 59 10ms 18 May 2022 382nd ZakkkkAttackkkk 🇵🇭 907 59 16ms 14 Jul 2022 382nd aksyristos 907 59 12ms 28 Oct 2022 382nd nstearns96 🇬🇧 907 59 11ms 28 Nov 2022 382nd janbehrens 🇩🇪 907 59 12ms 17 May 2023 382nd Shanethegamer 🇺🇸 907 59 11ms 25 May 2023 382nd Maznek 907 59 12ms 26 Jun 2023 382nd SpiritAxolotl 🇺🇸 907 59 14ms 20 Mar 2024 382nd Andrey-Plotnikov 907 59 11ms 19 May 2024 382nd emgordon154 907 59 12ms 5 Aug 2024 382nd duckyluuk 🇳🇱 907 59 12ms 3 Oct 2024 382nd lifthrasiir 🇰🇷 907 59 11ms 23 Nov 2024 382nd fuzzylojik-golf 🇺🇸 907 59 10ms 1 Jun 2025 382nd acollett89 907 59 12ms 17 Jun 2025 382nd iczelia 🇩🇪 907 59 11ms 23 Sep 2025 382nd Yax42 🇫🇷 907 59 11ms 20 Jan 2026 400th nipzu 906 48 46ms 8 Sep 2024 First Prev 321–400 of 3,618 Next Last