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 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 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 Multitap Input 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 ><> 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 ArkScript 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 ArkScript 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 Calendar 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 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 Multitap Input 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 399th revlayle 🇺🇸 906 86 416ms 7 Dec 2022 399th Widgitty 906 86 403ms 1 Sep 2023 399th albanian-laundromat 906 86 412ms 30 Sep 2025 404th shinh 905 52 37ms 29 Jun 2022 405th Lydxn 🇨🇦 905 64 181ms 1 Apr 2023 406th Lydxn 🇨🇦 905 70 86ms 7 May 2022 407th MeWhenI 🇻🇦 905 71 101ms 20 Aug 2024 408th m-tkach 🇺🇦 904 72 125ms 16 Oct 2022 408th GrayJoKing 🇦🇺 904 72 111ms 22 Oct 2022 408th emplv 🇱🇻 904 72 118ms 27 Oct 2022 408th sean-niemann 🇺🇸 904 72 137ms 7 Mar 2025 412th Steffan153 🇫🇮 904 82 42ms 1 Apr 2023 412th sean-niemann 🇺🇸 904 82 42ms 12 Jul 2024 414th stefangimmillaro 904 92 122ms 24 Oct 2023 414th inverseLorentz 🇦🇺 904 92 124ms 27 May 2024 414th sean-niemann 🇺🇸 904 92 129ms 8 Jun 2025 414th ian-h-chamberlain 🇺🇸 904 92 127ms 23 Nov 2025 418th michael-pruglo 🇺🇦 903 94 57ms 5 Jul 2022 418th zygoloid 903 94 56ms 5 Aug 2024 418th AdrienHache 🇫🇷 903 94 60ms 27 Dec 2025 421st Lydxn 🇨🇦 902 69 7ms 12 Sep 2022 421st GrayJoKing 🇦🇺 902 69 7ms 12 Sep 2022 421st btnlq 902 69 7ms 24 Sep 2022 424th albanian-laundromat 901 107 250ms 22 Dec 2025 425th SirBogman 🇺🇸 900 50 449ms 5 May 2022 425th nwellnhof 🇩🇪 900 50 423ms 3 Jun 2022 425th Lydxn 🇨🇦 900 50 437ms 15 Aug 2022 425th Steffan153 🇫🇮 900 50 579ms 9 Aug 2024 429th Steffan153 🇫🇮 900 67 113ms 18 Dec 2022 429th Lydxn 🇨🇦 900 67 116ms 4 Feb 2023 429th sean-niemann 🇺🇸 900 67 103ms 7 Mar 2025 432nd Lydxn 🇨🇦 900 72 353ms 16 Jul 2023 433rd GrayJoKing 🇦🇺 899 70 3ms 6 May 2022 433rd saito-ta 🇯🇵 899 70 2ms 21 Dec 2023 433rd ovs-code 🇩🇪 899 70 2ms 17 Feb 2024 433rd trinityy-7 899 70 2ms 7 Aug 2025 433rd KasperKivimaeki 🇫🇮 899 70 6ms 8 Aug 2025 438th Lydxn 🇨🇦 898 48 267ms 5 May 2022 438th p-zubieta 898 48 279ms 6 Mar 2024 440th edsrzf 🇳🇿 898 78 11ms 26 Oct 2024 440th kg583 🇺🇸 898 78 11ms 25 Sep 2025 442nd GrayJoKing 🇦🇺 898 91 29ms 19 Jan 2023 443rd DialFrost 🇸🇬 897 29 162ms 15 Mar 2025 444th Steffan153 🇫🇮 897 59 145ms 10 Aug 2024 444th rucin93 🇵🇱 897 59 146ms 13 Oct 2024 444th sean-niemann 🇺🇸 897 59 130ms 13 Oct 2024 444th lukegustafson 🇺🇸 897 59 161ms 24 Oct 2024 448th Ripick 897 73 133ms 8 May 2023 449th ovs-code 🇩🇪 897 89 438ms 24 Jul 2024 449th jipsong 🇩🇪 897 89 467ms 7 Apr 2025 449th DialFrost 🇸🇬 897 89 394ms 24 Dec 2025 452nd nwellnhof 🇩🇪 896 69 22ms 4 May 2022 452nd m-tkach 🇺🇦 896 69 17ms 4 May 2022 452nd GolfingSuccess 🇬🇷 896 69 15ms 5 May 2022 452nd jared-hughes 896 69 17ms 5 May 2022 452nd ovs-code 🇩🇪 896 69 23ms 5 May 2022 452nd btnlq 896 69 17ms 5 May 2022 452nd sisyphus-ppcg 🇦🇺 896 69 14ms 6 May 2022 452nd lynn 896 69 16ms 22 Aug 2022 452nd Steffan153 🇫🇮 896 69 17ms 15 Nov 2022 452nd AlexanderFair 896 69 23ms 19 Jul 2023 452nd pardouin 🇫🇷 896 69 17ms 11 Nov 2023 452nd AlephSquirrel 896 69 478ms 30 Dec 2023 452nd kg583 🇺🇸 896 69 23ms 28 Jan 2024 452nd davecame 896 69 22ms 20 Aug 2024 452nd zacjl 896 69 17ms 19 Sep 2024 452nd starfihs 896 69 16ms 12 Oct 2024 452nd kops-cg 896 69 22ms 9 Feb 2025 452nd sean-niemann 🇺🇸 896 69 17ms 7 Mar 2025 452nd plcc0 896 69 15ms 26 Mar 2025 452nd yujh-yujh 🇬🇸 896 69 16ms 28 Mar 2025 452nd moustave 896 69 16ms 10 Jun 2025 452nd 4atj 896 69 3,539ms 30 Jun 2025 452nd dirckvdende 896 69 18ms 11 Jul 2025 452nd xnor-gate 896 69 16ms 19 Aug 2025 452nd BrunoVisnadi 🇧🇷 896 69 16ms 1 Oct 2025 452nd Mukundan314 896 69 18ms 13 Nov 2025 452nd bizy-coder 896 69 16ms 21 Nov 2025 452nd duckyluuk 🇳🇱 896 69 17ms 4 Dec 2025 452nd bricknellj 896 69 17ms 4 Dec 2025 First Prev 401–480 of 3,540 Next Last