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 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 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 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 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 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 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 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 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 401st krcs 🇵🇱 906 86 372ms 10 May 2022 401st billings7 🇬🇧 906 86 347ms 15 May 2022 401st revlayle 🇺🇸 906 86 337ms 7 Dec 2022 401st Widgitty 906 86 319ms 1 Sep 2023 401st albanian-laundromat 906 86 383ms 30 Sep 2025 406th shinh 905 52 38ms 29 Jun 2022 407th Lydxn 🇨🇦 905 64 181ms 1 Apr 2023 408th Lydxn 🇨🇦 905 70 91ms 7 May 2022 409th MeWhenI 🇻🇦 905 71 102ms 20 Aug 2024 410th Shanethegamer 🇺🇸 904 72 3ms 4 May 2022 410th jared-hughes 904 72 4ms 4 May 2022 410th Waffle3z 904 72 4ms 5 May 2022 410th m-tkach 🇺🇦 904 72 99ms 16 Oct 2022 410th GrayJoKing 🇦🇺 904 72 105ms 22 Oct 2022 410th emplv 🇱🇻 904 72 101ms 27 Oct 2022 410th sean-niemann 🇺🇸 904 72 117ms 7 Mar 2025 410th Blendi-Goose 904 72 4ms 16 Mar 2025 410th edsrzf 🇳🇿 904 72 5ms 12 Apr 2025 410th sean-niemann 🇺🇸 904 72 3ms 16 Oct 2025 420th Steffan153 🇫🇮 904 82 42ms 1 Apr 2023 420th sean-niemann 🇺🇸 904 82 42ms 12 Jul 2024 422nd stefangimmillaro 904 92 131ms 24 Oct 2023 422nd inverseLorentz 🇦🇺 904 92 128ms 27 May 2024 422nd sean-niemann 🇺🇸 904 92 125ms 8 Jun 2025 422nd ian-h-chamberlain 🇺🇸 904 92 123ms 25 days ago 426th Lydxn 🇨🇦 902 69 7ms 12 Sep 2022 426th GrayJoKing 🇦🇺 902 69 7ms 12 Sep 2022 426th btnlq 902 69 7ms 24 Sep 2022 429th michael-pruglo 🇺🇦 902 94 64ms 5 Jul 2022 429th zygoloid 902 94 74ms 5 Aug 2024 431st SirBogman 🇺🇸 900 50 402ms 5 May 2022 431st nwellnhof 🇩🇪 900 50 397ms 3 Jun 2022 431st Lydxn 🇨🇦 900 50 404ms 15 Aug 2022 431st Steffan153 🇫🇮 900 50 408ms 9 Aug 2024 435th Lydxn 🇨🇦 900 72 353ms 16 Jul 2023 436th DialFrost 🇸🇬 899 69 88ms 15 Jul 2024 437th Lydxn 🇨🇦 898 48 303ms 5 May 2022 437th p-zubieta 898 48 316ms 6 Mar 2024 439th GrayJoKing 🇦🇺 898 70 3ms 6 May 2022 439th saito-ta 🇯🇵 898 70 2ms 21 Dec 2023 439th ovs-code 🇩🇪 898 70 2ms 17 Feb 2024 439th trinityy-7 898 70 2ms 7 Aug 2025 439th KasperKivimaeki 🇫🇮 898 70 6ms 8 Aug 2025 444th edsrzf 🇳🇿 898 78 11ms 26 Oct 2024 444th kg583 🇺🇸 898 78 12ms 25 Sep 2025 446th GrayJoKing 🇦🇺 898 91 29ms 19 Jan 2023 447th DialFrost 🇸🇬 897 29 218ms 15 Mar 2025 448th Steffan153 🇫🇮 897 59 131ms 10 Aug 2024 448th rucin93 🇵🇱 897 59 132ms 13 Oct 2024 448th sean-niemann 🇺🇸 897 59 134ms 13 Oct 2024 448th lukegustafson 🇺🇸 897 59 133ms 24 Oct 2024 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 26 days ago 452nd duckyluuk 🇳🇱 896 69 17ms 13 days ago 452nd bricknellj 896 69 17ms 13 days ago First Prev 401–480 of 3,525 Next Last