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 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 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 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 Lily 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 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 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 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 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 400th edsrzf 🇳🇿 906 82 18ms 6 Jan 2025 402nd krcs 🇵🇱 906 86 394ms 10 May 2022 402nd billings7 🇬🇧 906 86 418ms 15 May 2022 402nd revlayle 🇺🇸 906 86 416ms 7 Dec 2022 402nd Widgitty 906 86 403ms 1 Sep 2023 402nd albanian-laundromat 906 86 412ms 30 Sep 2025 407th shinh 905 52 37ms 29 Jun 2022 408th Lydxn 🇨🇦 905 70 86ms 7 May 2022 409th MeWhenI 🇻🇦 905 71 101ms 20 Aug 2024 410th m-tkach 🇺🇦 904 72 104ms 16 Oct 2022 410th GrayJoKing 🇦🇺 904 72 121ms 22 Oct 2022 410th emplv 🇱🇻 904 72 113ms 27 Oct 2022 410th sean-niemann 🇺🇸 904 72 114ms 7 Mar 2025 414th Steffan153 🇫🇮 904 82 42ms 1 Apr 2023 414th sean-niemann 🇺🇸 904 82 42ms 12 Jul 2024 416th stefangimmillaro 904 92 122ms 24 Oct 2023 416th inverseLorentz 🇦🇺 904 92 124ms 27 May 2024 416th sean-niemann 🇺🇸 904 92 125ms 8 Jun 2025 416th ian-h-chamberlain 🇺🇸 904 92 127ms 23 Nov 2025 420th michael-pruglo 🇺🇦 903 94 57ms 5 Jul 2022 420th zygoloid 903 94 56ms 5 Aug 2024 420th AdrienHache 🇫🇷 903 94 60ms 27 Dec 2025 423rd Lydxn 🇨🇦 902 69 7ms 12 Sep 2022 423rd GrayJoKing 🇦🇺 902 69 7ms 12 Sep 2022 423rd btnlq 902 69 7ms 24 Sep 2022 426th albanian-laundromat 901 107 293ms 22 Dec 2025 427th SirBogman 🇺🇸 900 50 449ms 5 May 2022 427th nwellnhof 🇩🇪 900 50 423ms 3 Jun 2022 427th Lydxn 🇨🇦 900 50 437ms 15 Aug 2022 427th Steffan153 🇫🇮 900 50 579ms 9 Aug 2024 431st Steffan153 🇫🇮 900 67 113ms 18 Dec 2022 431st Lydxn 🇨🇦 900 67 116ms 4 Feb 2023 431st sean-niemann 🇺🇸 900 67 99ms 7 Mar 2025 434th Lydxn 🇨🇦 900 72 353ms 16 Jul 2023 435th GrayJoKing 🇦🇺 899 70 3ms 6 May 2022 435th saito-ta 🇯🇵 899 70 2ms 21 Dec 2023 435th ovs-code 🇩🇪 899 70 2ms 17 Feb 2024 435th trinityy-7 899 70 2ms 7 Aug 2025 435th KasperKivimaeki 🇫🇮 899 70 6ms 8 Aug 2025 440th GrayJoKing 🇦🇺 899 91 29ms 19 Jan 2023 441st Lydxn 🇨🇦 898 48 291ms 5 May 2022 441st p-zubieta 898 48 299ms 6 Mar 2024 443rd edsrzf 🇳🇿 898 78 11ms 26 Oct 2024 443rd kg583 🇺🇸 898 78 11ms 25 Sep 2025 445th DialFrost 🇸🇬 897 29 162ms 15 Mar 2025 446th Steffan153 🇫🇮 897 59 143ms 10 Aug 2024 446th rucin93 🇵🇱 897 59 146ms 13 Oct 2024 446th sean-niemann 🇺🇸 897 59 130ms 13 Oct 2024 446th lukegustafson 🇺🇸 897 59 140ms 24 Oct 2024 450th Ripick 897 73 133ms 8 May 2023 451st NickTheEASDude 🇺🇸 897 76 6ms 7 May 2024 451st edsrzf 🇳🇿 897 76 6ms 23 Dec 2025 451st Shanethegamer 🇺🇸 897 76 5ms 23 Dec 2025 451st jared-hughes 897 76 5ms 24 Dec 2025 451st Waffle3z 897 76 5ms 26 Dec 2025 451st Blendi-Goose 897 76 5ms 4 days ago 457th ovs-code 🇩🇪 897 89 438ms 24 Jul 2024 457th jipsong 🇩🇪 897 89 467ms 7 Apr 2025 457th DialFrost 🇸🇬 897 89 394ms 24 Dec 2025 457th dokutan 897 89 404ms 2 days ago 461st nwellnhof 🇩🇪 896 69 25ms 4 May 2022 461st m-tkach 🇺🇦 896 69 18ms 4 May 2022 461st GolfingSuccess 🇬🇷 896 69 20ms 5 May 2022 461st jared-hughes 896 69 19ms 5 May 2022 461st ovs-code 🇩🇪 896 69 23ms 5 May 2022 461st btnlq 896 69 18ms 5 May 2022 461st sisyphus-ppcg 🇦🇺 896 69 17ms 6 May 2022 461st lynn 896 69 19ms 22 Aug 2022 461st Steffan153 🇫🇮 896 69 19ms 15 Nov 2022 461st AlexanderFair 896 69 24ms 19 Jul 2023 461st pardouin 🇫🇷 896 69 18ms 11 Nov 2023 461st AlephSquirrel 896 69 479ms 30 Dec 2023 461st kg583 🇺🇸 896 69 25ms 28 Jan 2024 461st davecame 896 69 23ms 20 Aug 2024 461st zacjl 896 69 21ms 19 Sep 2024 461st starfihs 896 69 25ms 12 Oct 2024 461st kops-cg 896 69 25ms 9 Feb 2025 461st sean-niemann 🇺🇸 896 69 20ms 7 Mar 2025 461st plcc0 896 69 17ms 26 Mar 2025 461st yujh-yujh 🇬🇸 896 69 18ms 28 Mar 2025 First Prev 401–480 of 3,572 Next Last