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 401st Shanethegamer 🇺🇸 906 82 17ms 19 Dec 2023 401st edsrzf 🇳🇿 906 82 18ms 6 Jan 2025 403rd krcs 🇵🇱 906 86 394ms 10 May 2022 403rd billings7 🇬🇧 906 86 418ms 15 May 2022 403rd revlayle 🇺🇸 906 86 416ms 7 Dec 2022 403rd Widgitty 906 86 403ms 1 Sep 2023 403rd albanian-laundromat 906 86 412ms 30 Sep 2025 408th shinh 905 52 37ms 29 Jun 2022 409th Lydxn 🇨🇦 905 70 86ms 7 May 2022 410th MeWhenI 🇻🇦 905 71 101ms 20 Aug 2024 411th m-tkach 🇺🇦 904 72 104ms 16 Oct 2022 411th GrayJoKing 🇦🇺 904 72 121ms 22 Oct 2022 411th emplv 🇱🇻 904 72 113ms 27 Oct 2022 411th sean-niemann 🇺🇸 904 72 114ms 7 Mar 2025 415th Steffan153 🇫🇮 904 82 42ms 1 Apr 2023 415th sean-niemann 🇺🇸 904 82 42ms 12 Jul 2024 417th stefangimmillaro 904 92 122ms 24 Oct 2023 417th inverseLorentz 🇦🇺 904 92 124ms 27 May 2024 417th sean-niemann 🇺🇸 904 92 125ms 8 Jun 2025 417th ian-h-chamberlain 🇺🇸 904 92 127ms 23 Nov 2025 421st michael-pruglo 🇺🇦 903 94 57ms 5 Jul 2022 421st zygoloid 903 94 56ms 5 Aug 2024 421st AdrienHache 🇫🇷 903 94 60ms 27 Dec 2025 424th Lydxn 🇨🇦 902 69 7ms 12 Sep 2022 424th GrayJoKing 🇦🇺 902 69 7ms 12 Sep 2022 424th btnlq 902 69 7ms 24 Sep 2022 427th albanian-laundromat 901 107 293ms 22 Dec 2025 428th SirBogman 🇺🇸 900 50 449ms 5 May 2022 428th nwellnhof 🇩🇪 900 50 423ms 3 Jun 2022 428th Lydxn 🇨🇦 900 50 437ms 15 Aug 2022 428th Steffan153 🇫🇮 900 50 579ms 9 Aug 2024 432nd Steffan153 🇫🇮 900 67 113ms 18 Dec 2022 432nd Lydxn 🇨🇦 900 67 116ms 4 Feb 2023 432nd sean-niemann 🇺🇸 900 67 99ms 7 Mar 2025 435th Lydxn 🇨🇦 900 72 353ms 16 Jul 2023 436th GrayJoKing 🇦🇺 899 70 3ms 6 May 2022 436th saito-ta 🇯🇵 899 70 2ms 21 Dec 2023 436th ovs-code 🇩🇪 899 70 2ms 17 Feb 2024 436th trinityy-7 899 70 2ms 7 Aug 2025 436th KasperKivimaeki 🇫🇮 899 70 6ms 8 Aug 2025 441st GrayJoKing 🇦🇺 899 91 29ms 19 Jan 2023 442nd Lydxn 🇨🇦 898 48 291ms 5 May 2022 442nd p-zubieta 898 48 299ms 6 Mar 2024 444th edsrzf 🇳🇿 898 78 11ms 26 Oct 2024 444th kg583 🇺🇸 898 78 11ms 25 Sep 2025 446th DialFrost 🇸🇬 897 29 162ms 15 Mar 2025 447th Steffan153 🇫🇮 897 59 143ms 10 Aug 2024 447th rucin93 🇵🇱 897 59 146ms 13 Oct 2024 447th sean-niemann 🇺🇸 897 59 130ms 13 Oct 2024 447th lukegustafson 🇺🇸 897 59 140ms 24 Oct 2024 451st Ripick 897 73 133ms 8 May 2023 452nd NickTheEASDude 🇺🇸 897 76 6ms 7 May 2024 452nd edsrzf 🇳🇿 897 76 6ms 23 Dec 2025 452nd Shanethegamer 🇺🇸 897 76 5ms 23 Dec 2025 452nd jared-hughes 897 76 5ms 24 Dec 2025 452nd Waffle3z 897 76 5ms 26 Dec 2025 452nd Blendi-Goose 897 76 5ms 4 days ago 458th ovs-code 🇩🇪 897 89 438ms 24 Jul 2024 458th jipsong 🇩🇪 897 89 467ms 7 Apr 2025 458th DialFrost 🇸🇬 897 89 394ms 24 Dec 2025 458th dokutan 897 89 404ms 2 days ago 462nd nwellnhof 🇩🇪 896 69 25ms 4 May 2022 462nd m-tkach 🇺🇦 896 69 18ms 4 May 2022 462nd GolfingSuccess 🇬🇷 896 69 20ms 5 May 2022 462nd jared-hughes 896 69 19ms 5 May 2022 462nd ovs-code 🇩🇪 896 69 23ms 5 May 2022 462nd btnlq 896 69 18ms 5 May 2022 462nd sisyphus-ppcg 🇦🇺 896 69 17ms 6 May 2022 462nd lynn 896 69 19ms 22 Aug 2022 462nd Steffan153 🇫🇮 896 69 19ms 15 Nov 2022 462nd AlexanderFair 896 69 24ms 19 Jul 2023 462nd pardouin 🇫🇷 896 69 18ms 11 Nov 2023 462nd AlephSquirrel 896 69 479ms 30 Dec 2023 462nd kg583 🇺🇸 896 69 25ms 28 Jan 2024 462nd davecame 896 69 23ms 20 Aug 2024 462nd zacjl 896 69 21ms 19 Sep 2024 462nd starfihs 896 69 25ms 12 Oct 2024 462nd kops-cg 896 69 25ms 9 Feb 2025 462nd sean-niemann 🇺🇸 896 69 20ms 7 Mar 2025 462nd plcc0 896 69 17ms 26 Mar 2025 First Prev 401–480 of 3,573 Next Last