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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 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 NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Tower of Hanoi 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 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 NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Bytes Time Submitted 374th KingSkyrock 🇺🇸 907 59 10ms 18 May 2022 374th ZakkkkAttackkkk 🇵🇭 907 59 11ms 14 Jul 2022 374th aksyristos 907 59 10ms 28 Oct 2022 374th nstearns96 🇬🇧 907 59 9ms 28 Nov 2022 374th janbehrens 🇩🇪 907 59 10ms 17 May 2023 374th Shanethegamer 🇺🇸 907 59 10ms 25 May 2023 374th Maznek 907 59 9ms 26 Jun 2023 374th SpiritAxolotl 🇺🇸 907 59 10ms 20 Mar 2024 374th Andrey-Plotnikov 907 59 9ms 19 May 2024 374th emgordon154 907 59 9ms 5 Aug 2024 374th duckyluuk 🇳🇱 907 59 9ms 3 Oct 2024 374th lifthrasiir 🇰🇷 907 59 9ms 23 Nov 2024 374th fuzzylojik-golf 🇺🇸 907 59 11ms 1 Jun 2025 374th acollett89 907 59 10ms 17 Jun 2025 374th iczelia 🇩🇪 907 59 11ms 23 Sep 2025 391st nipzu 906 48 51ms 8 Sep 2024 392nd Steffan153 🇫🇮 906 80 40ms 15 Nov 2022 392nd error256 906 80 130ms 8 Apr 2025 394th Shanethegamer 🇺🇸 906 82 17ms 19 Dec 2023 394th edsrzf 🇳🇿 906 82 18ms 6 Jan 2025 396th krcs 🇵🇱 906 86 309ms 10 May 2022 396th billings7 🇬🇧 906 86 328ms 15 May 2022 396th revlayle 🇺🇸 906 86 330ms 7 Dec 2022 396th Widgitty 906 86 326ms 1 Sep 2023 396th albanian-laundromat 906 86 362ms 30 Sep 2025 401st shinh 905 52 42ms 29 Jun 2022 402nd Lydxn 🇨🇦 905 64 199ms 1 Apr 2023 403rd Lydxn 🇨🇦 905 70 88ms 7 May 2022 404th MeWhenI 🇻🇦 905 71 102ms 20 Aug 2024 405th Shanethegamer 🇺🇸 904 72 4ms 4 May 2022 405th jared-hughes 904 72 4ms 4 May 2022 405th Waffle3z 904 72 7ms 5 May 2022 405th m-tkach 🇺🇦 904 72 104ms 16 Oct 2022 405th GrayJoKing 🇦🇺 904 72 114ms 22 Oct 2022 405th emplv 🇱🇻 904 72 105ms 27 Oct 2022 405th sean-niemann 🇺🇸 904 72 124ms 7 Mar 2025 405th Blendi-Goose 904 72 6ms 16 Mar 2025 405th edsrzf 🇳🇿 904 72 5ms 12 Apr 2025 405th sean-niemann 🇺🇸 904 72 6ms 16 Oct 2025 415th stefangimmillaro 904 92 131ms 24 Oct 2023 415th inverseLorentz 🇦🇺 904 92 124ms 27 May 2024 415th sean-niemann 🇺🇸 904 92 124ms 8 Jun 2025 415th ian-h-chamberlain 🇺🇸 904 92 127ms 7 days ago 419th Steffan153 🇫🇮 903 82 44ms 1 Apr 2023 419th sean-niemann 🇺🇸 903 82 43ms 12 Jul 2024 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 michael-pruglo 🇺🇦 902 94 52ms 5 Jul 2022 424th zygoloid 902 94 51ms 5 Aug 2024 426th Lydxn 🇨🇦 901 108 260ms 6 May 2022 426th CaedenHarper 🇨🇦 901 108 256ms 5 Oct 2025 428th SirBogman 🇺🇸 900 50 407ms 5 May 2022 428th nwellnhof 🇩🇪 900 50 402ms 3 Jun 2022 428th Lydxn 🇨🇦 900 50 413ms 15 Aug 2022 428th Steffan153 🇫🇮 900 50 390ms 9 Aug 2024 432nd DialFrost 🇸🇬 899 69 88ms 15 Jul 2024 433rd Lydxn 🇨🇦 898 48 249ms 5 May 2022 433rd p-zubieta 898 48 259ms 6 Mar 2024 435th GrayJoKing 🇦🇺 898 70 2ms 6 May 2022 435th saito-ta 🇯🇵 898 70 3ms 21 Dec 2023 435th ovs-code 🇩🇪 898 70 2ms 17 Feb 2024 435th trinityy-7 898 70 2ms 7 Aug 2025 435th KasperKivimaeki 🇫🇮 898 70 6ms 8 Aug 2025 440th Lydxn 🇨🇦 898 72 302ms 16 Jul 2023 441st edsrzf 🇳🇿 898 78 12ms 26 Oct 2024 441st kg583 🇺🇸 898 78 11ms 25 Sep 2025 443rd GrayJoKing 🇦🇺 898 91 31ms 19 Jan 2023 444th DialFrost 🇸🇬 897 29 162ms 15 Mar 2025 445th Steffan153 🇫🇮 897 59 137ms 10 Aug 2024 445th rucin93 🇵🇱 897 59 136ms 13 Oct 2024 445th sean-niemann 🇺🇸 897 59 137ms 13 Oct 2024 445th lukegustafson 🇺🇸 897 59 135ms 24 Oct 2024 449th nwellnhof 🇩🇪 896 69 22ms 4 May 2022 449th m-tkach 🇺🇦 896 69 18ms 4 May 2022 First Prev 376–450 of 3,493 Next Last