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 393rd Maznek 907 59 13ms 26 Jun 2023 393rd SpiritAxolotl 🇺🇸 907 59 12ms 20 Mar 2024 393rd Andrey-Plotnikov 907 59 11ms 19 May 2024 393rd emgordon154 907 59 10ms 5 Aug 2024 393rd duckyluuk 🇳🇱 907 59 15ms 3 Oct 2024 393rd lifthrasiir 🇰🇷 907 59 11ms 23 Nov 2024 393rd fuzzylojik-golf 🇺🇸 907 59 12ms 1 Jun 2025 393rd acollett89 907 59 12ms 17 Jun 2025 393rd iczelia 🇩🇪 907 59 11ms 23 Sep 2025 393rd Yax42 🇫🇷 907 59 11ms 20 Jan 2026 393rd Protothor 907 59 11ms 13 days ago 412th krcs 🇵🇱 907 86 380ms 10 May 2022 412th billings7 🇬🇧 907 86 376ms 15 May 2022 412th revlayle 🇺🇸 907 86 379ms 7 Dec 2022 412th Widgitty 907 86 367ms 1 Sep 2023 412th albanian-laundromat 🇺🇸 907 86 430ms 30 Sep 2025 417th piano-miles 907 92 411ms 24 Feb 2026 418th shinh 906 52 42ms 29 Jun 2022 419th Lydxn 🇨🇦 906 64 181ms 1 Apr 2023 420th MeWhenI 🇻🇦 906 71 139ms 20 Aug 2024 421st DialFrost 🇸🇬 906 74 17ms 22 Feb 2026 421st Steffan153 🇫🇮 906 74 17ms 22 Feb 2026 421st GrayJoKing 🇦🇺 906 74 16ms 22 Feb 2026 421st GolfingSuccess 🇬🇷 906 74 16ms 24 Feb 2026 421st snoozingnewt 🇨🇦 906 74 16ms 4 Mar 2026 421st edsrzf 🇳🇿 906 74 16ms 9 Mar 2026 427th Steffan153 🇫🇮 906 82 42ms 1 Apr 2023 427th sean-niemann 🇺🇸 906 82 42ms 12 Jul 2024 429th Lydxn 🇨🇦 905 70 96ms 7 May 2022 430th m-tkach 🇺🇦 905 72 110ms 16 Oct 2022 430th GrayJoKing 🇦🇺 905 72 118ms 22 Oct 2022 430th emplv 🇱🇻 905 72 110ms 27 Oct 2022 430th sean-niemann 🇺🇸 905 72 124ms 7 Mar 2025 434th stefangimmillaro 904 92 130ms 24 Oct 2023 434th inverseLorentz 🇦🇺 904 92 120ms 27 May 2024 434th sean-niemann 🇺🇸 904 92 129ms 8 Jun 2025 434th ian-h-chamberlain 🇺🇸 904 92 140ms 23 Nov 2025 438th michael-pruglo 🇺🇦 904 94 58ms 5 Jul 2022 438th zygoloid 904 94 59ms 5 Aug 2024 438th AdrienHache 🇫🇷 904 94 57ms 27 Dec 2025 441st Lydxn 🇨🇦 902 69 6ms 12 Sep 2022 441st GrayJoKing 🇦🇺 902 69 7ms 12 Sep 2022 441st btnlq 902 69 7ms 24 Sep 2022 444th Steffan153 🇫🇮 901 67 110ms 18 Dec 2022 444th Lydxn 🇨🇦 901 67 118ms 4 Feb 2023 444th sean-niemann 🇺🇸 901 67 110ms 7 Mar 2025 447th Lydxn 🇨🇦 901 72 353ms 16 Jul 2023 448th albanian-laundromat 🇺🇸 901 107 329ms 22 Dec 2025 449th SirBogman 🇺🇸 900 50 506ms 5 May 2022 449th nwellnhof 🇩🇪 900 50 419ms 3 Jun 2022 449th Lydxn 🇨🇦 900 50 431ms 15 Aug 2022 449th Steffan153 🇫🇮 900 50 436ms 9 Aug 2024 453rd GrayJoKing 🇦🇺 900 91 30ms 19 Jan 2023 454th Lydxn 🇨🇦 899 48 257ms 5 May 2022 454th p-zubieta 899 48 283ms 6 Mar 2024 456th GrayJoKing 🇦🇺 899 70 2ms 6 May 2022 456th saito-ta 🇯🇵 899 70 2ms 21 Dec 2023 456th ovs-code 🇩🇪 899 70 2ms 17 Feb 2024 456th trinityy-7 899 70 2ms 7 Aug 2025 456th KasperKivimaeki 🇫🇮 899 70 6ms 8 Aug 2025 461st NickTheEASDude 🇺🇸 899 76 6ms 7 May 2024 461st edsrzf 🇳🇿 899 76 6ms 23 Dec 2025 461st Shanethegamer 🇺🇸 899 76 5ms 23 Dec 2025 461st jared-hughes 899 76 5ms 24 Dec 2025 461st Waffle3z 899 76 5ms 26 Dec 2025 461st Blendi-Goose 899 76 5ms 6 Feb 2026 461st kTheLemon 899 76 5ms 7 Mar 2026 468th edsrzf 🇳🇿 899 78 12ms 26 Oct 2024 469th m-tkach 🇺🇦 899 117 25ms 7 May 2022 469th Lydxn 🇨🇦 899 117 26ms 7 May 2022 471st Steffan153 🇫🇮 898 59 148ms 10 Aug 2024 471st rucin93 🇵🇱 898 59 157ms 13 Oct 2024 471st sean-niemann 🇺🇸 898 59 141ms 13 Oct 2024 471st lukegustafson 🇺🇸 898 59 182ms 24 Oct 2024 475th Ripick 898 73 122ms 8 May 2023 476th ovs-code 🇩🇪 898 89 458ms 24 Jul 2024 476th jipsong 🇩🇪 898 89 450ms 7 Apr 2025 476th DialFrost 🇸🇬 898 89 485ms 24 Dec 2025 476th dokutan 898 89 425ms 8 Feb 2026 480th DialFrost 🇸🇬 897 29 154ms 15 Mar 2025 First Prev 401–480 of 3,729 Next Last