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 372nd aksyristos 907 59 11ms 28 Oct 2022 372nd nstearns96 🇬🇧 907 59 12ms 28 Nov 2022 372nd janbehrens 🇩🇪 907 59 11ms 17 May 2023 372nd Shanethegamer 🇺🇸 907 59 10ms 25 May 2023 372nd Maznek 907 59 10ms 26 Jun 2023 372nd SpiritAxolotl 🇺🇸 907 59 10ms 20 Mar 2024 372nd Andrey-Plotnikov 907 59 9ms 19 May 2024 372nd emgordon154 907 59 9ms 5 Aug 2024 372nd duckyluuk 🇳🇱 907 59 10ms 3 Oct 2024 372nd lifthrasiir 🇰🇷 907 59 13ms 23 Nov 2024 372nd fuzzylojik-golf 🇺🇸 907 59 11ms 1 Jun 2025 372nd acollett89 907 59 11ms 17 Jun 2025 372nd iczelia 🇩🇪 907 59 11ms 23 Sep 2025 389th nipzu 906 48 51ms 8 Sep 2024 390th Steffan153 🇫🇮 906 80 40ms 15 Nov 2022 390th error256 906 80 130ms 8 Apr 2025 392nd Shanethegamer 🇺🇸 906 82 19ms 19 Dec 2023 392nd edsrzf 🇳🇿 906 82 19ms 6 Jan 2025 394th krcs 🇵🇱 906 86 309ms 10 May 2022 394th billings7 🇬🇧 906 86 328ms 15 May 2022 394th revlayle 🇺🇸 906 86 330ms 7 Dec 2022 394th Widgitty 906 86 326ms 1 Sep 2023 394th albanian-laundromat 906 86 362ms 30 Sep 2025 399th shinh 905 52 42ms 29 Jun 2022 400th Lydxn 🇨🇦 905 64 199ms 1 Apr 2023 401st Lydxn 🇨🇦 905 70 88ms 7 May 2022 402nd MeWhenI 🇻🇦 905 71 102ms 20 Aug 2024 403rd Shanethegamer 🇺🇸 904 72 4ms 4 May 2022 403rd jared-hughes 904 72 4ms 4 May 2022 403rd Waffle3z 904 72 7ms 5 May 2022 403rd m-tkach 🇺🇦 904 72 104ms 16 Oct 2022 403rd GrayJoKing 🇦🇺 904 72 116ms 22 Oct 2022 403rd emplv 🇱🇻 904 72 105ms 27 Oct 2022 403rd sean-niemann 🇺🇸 904 72 132ms 7 Mar 2025 403rd Blendi-Goose 904 72 6ms 16 Mar 2025 403rd edsrzf 🇳🇿 904 72 5ms 12 Apr 2025 403rd sean-niemann 🇺🇸 904 72 6ms 16 Oct 2025 413th stefangimmillaro 904 92 131ms 24 Oct 2023 413th inverseLorentz 🇦🇺 904 92 124ms 27 May 2024 413th sean-niemann 🇺🇸 904 92 124ms 8 Jun 2025 413th ian-h-chamberlain 🇺🇸 904 92 127ms 2 days ago 417th Steffan153 🇫🇮 903 82 44ms 1 Apr 2023 417th sean-niemann 🇺🇸 903 82 43ms 12 Jul 2024 419th Lydxn 🇨🇦 902 69 7ms 12 Sep 2022 419th GrayJoKing 🇦🇺 902 69 7ms 12 Sep 2022 419th btnlq 902 69 7ms 24 Sep 2022 422nd michael-pruglo 🇺🇦 902 94 52ms 5 Jul 2022 422nd zygoloid 902 94 51ms 5 Aug 2024 424th Lydxn 🇨🇦 901 108 260ms 6 May 2022 424th CaedenHarper 🇨🇦 901 108 256ms 5 Oct 2025 426th SirBogman 🇺🇸 900 50 407ms 5 May 2022 426th nwellnhof 🇩🇪 900 50 402ms 3 Jun 2022 426th Lydxn 🇨🇦 900 50 413ms 15 Aug 2022 426th Steffan153 🇫🇮 900 50 390ms 9 Aug 2024 430th DialFrost 🇸🇬 899 69 88ms 15 Jul 2024 431st Lydxn 🇨🇦 898 48 256ms 5 May 2022 431st p-zubieta 898 48 259ms 6 Mar 2024 433rd GrayJoKing 🇦🇺 898 70 2ms 6 May 2022 433rd saito-ta 🇯🇵 898 70 3ms 21 Dec 2023 433rd ovs-code 🇩🇪 898 70 2ms 17 Feb 2024 433rd trinityy-7 898 70 2ms 7 Aug 2025 433rd KasperKivimaeki 🇫🇮 898 70 6ms 8 Aug 2025 438th Lydxn 🇨🇦 898 72 302ms 16 Jul 2023 439th edsrzf 🇳🇿 898 78 12ms 26 Oct 2024 439th kg583 🇺🇸 898 78 11ms 25 Sep 2025 441st GrayJoKing 🇦🇺 898 91 31ms 19 Jan 2023 442nd DialFrost 🇸🇬 897 29 162ms 15 Mar 2025 443rd Steffan153 🇫🇮 897 59 137ms 10 Aug 2024 443rd rucin93 🇵🇱 897 59 136ms 13 Oct 2024 443rd sean-niemann 🇺🇸 897 59 137ms 13 Oct 2024 443rd lukegustafson 🇺🇸 897 59 135ms 24 Oct 2024 447th nwellnhof 🇩🇪 896 69 22ms 4 May 2022 447th m-tkach 🇺🇦 896 69 18ms 4 May 2022 447th GolfingSuccess 🇬🇷 896 69 16ms 5 May 2022 447th jared-hughes 896 69 34ms 5 May 2022 First Prev 376–450 of 3,485 Next Last