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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 373rd ZakkkkAttackkkk 🇵🇭 907 59 11ms 14 Jul 2022 373rd aksyristos 907 59 10ms 28 Oct 2022 373rd nstearns96 🇬🇧 907 59 9ms 28 Nov 2022 373rd janbehrens 🇩🇪 907 59 10ms 17 May 2023 373rd Shanethegamer 🇺🇸 907 59 10ms 25 May 2023 373rd Maznek 907 59 9ms 26 Jun 2023 373rd SpiritAxolotl 🇺🇸 907 59 10ms 20 Mar 2024 373rd Andrey-Plotnikov 907 59 9ms 19 May 2024 373rd emgordon154 907 59 9ms 5 Aug 2024 373rd duckyluuk 🇳🇱 907 59 9ms 3 Oct 2024 373rd lifthrasiir 🇰🇷 907 59 9ms 23 Nov 2024 373rd fuzzylojik-golf 🇺🇸 907 59 11ms 1 Jun 2025 373rd acollett89 907 59 10ms 17 Jun 2025 373rd iczelia 🇩🇪 907 59 11ms 23 Sep 2025 390th nipzu 906 48 51ms 8 Sep 2024 391st Steffan153 🇫🇮 906 80 40ms 15 Nov 2022 391st error256 906 80 130ms 8 Apr 2025 393rd Shanethegamer 🇺🇸 906 82 17ms 19 Dec 2023 393rd edsrzf 🇳🇿 906 82 18ms 6 Jan 2025 395th krcs 🇵🇱 906 86 309ms 10 May 2022 395th billings7 🇬🇧 906 86 328ms 15 May 2022 395th revlayle 🇺🇸 906 86 330ms 7 Dec 2022 395th Widgitty 906 86 326ms 1 Sep 2023 395th albanian-laundromat 906 86 362ms 30 Sep 2025 400th shinh 905 52 42ms 29 Jun 2022 401st Lydxn 🇨🇦 905 64 199ms 1 Apr 2023 402nd Lydxn 🇨🇦 905 70 88ms 7 May 2022 403rd MeWhenI 🇻🇦 905 71 102ms 20 Aug 2024 404th Shanethegamer 🇺🇸 904 72 4ms 4 May 2022 404th jared-hughes 904 72 4ms 4 May 2022 404th Waffle3z 904 72 7ms 5 May 2022 404th m-tkach 🇺🇦 904 72 104ms 16 Oct 2022 404th GrayJoKing 🇦🇺 904 72 114ms 22 Oct 2022 404th emplv 🇱🇻 904 72 105ms 27 Oct 2022 404th sean-niemann 🇺🇸 904 72 124ms 7 Mar 2025 404th Blendi-Goose 904 72 6ms 16 Mar 2025 404th edsrzf 🇳🇿 904 72 5ms 12 Apr 2025 404th sean-niemann 🇺🇸 904 72 6ms 16 Oct 2025 414th stefangimmillaro 904 92 131ms 24 Oct 2023 414th inverseLorentz 🇦🇺 904 92 124ms 27 May 2024 414th sean-niemann 🇺🇸 904 92 124ms 8 Jun 2025 414th ian-h-chamberlain 🇺🇸 904 92 127ms 7 days ago 418th Steffan153 🇫🇮 903 82 44ms 1 Apr 2023 418th sean-niemann 🇺🇸 903 82 43ms 12 Jul 2024 420th Lydxn 🇨🇦 902 69 7ms 12 Sep 2022 420th GrayJoKing 🇦🇺 902 69 7ms 12 Sep 2022 420th btnlq 902 69 7ms 24 Sep 2022 423rd michael-pruglo 🇺🇦 902 94 52ms 5 Jul 2022 423rd zygoloid 902 94 51ms 5 Aug 2024 425th Lydxn 🇨🇦 901 108 260ms 6 May 2022 425th CaedenHarper 🇨🇦 901 108 256ms 5 Oct 2025 427th SirBogman 🇺🇸 900 50 407ms 5 May 2022 427th nwellnhof 🇩🇪 900 50 402ms 3 Jun 2022 427th Lydxn 🇨🇦 900 50 413ms 15 Aug 2022 427th Steffan153 🇫🇮 900 50 390ms 9 Aug 2024 431st DialFrost 🇸🇬 899 69 88ms 15 Jul 2024 432nd Lydxn 🇨🇦 898 48 249ms 5 May 2022 432nd p-zubieta 898 48 259ms 6 Mar 2024 434th GrayJoKing 🇦🇺 898 70 2ms 6 May 2022 434th saito-ta 🇯🇵 898 70 3ms 21 Dec 2023 434th ovs-code 🇩🇪 898 70 2ms 17 Feb 2024 434th trinityy-7 898 70 2ms 7 Aug 2025 434th KasperKivimaeki 🇫🇮 898 70 6ms 8 Aug 2025 439th Lydxn 🇨🇦 898 72 302ms 16 Jul 2023 440th edsrzf 🇳🇿 898 78 12ms 26 Oct 2024 440th kg583 🇺🇸 898 78 11ms 25 Sep 2025 442nd GrayJoKing 🇦🇺 898 91 31ms 19 Jan 2023 443rd DialFrost 🇸🇬 897 29 162ms 15 Mar 2025 444th Steffan153 🇫🇮 897 59 137ms 10 Aug 2024 444th rucin93 🇵🇱 897 59 136ms 13 Oct 2024 444th sean-niemann 🇺🇸 897 59 137ms 13 Oct 2024 444th lukegustafson 🇺🇸 897 59 135ms 24 Oct 2024 448th nwellnhof 🇩🇪 896 69 22ms 4 May 2022 448th m-tkach 🇺🇦 896 69 18ms 4 May 2022 448th GolfingSuccess 🇬🇷 896 69 16ms 5 May 2022 First Prev 376–450 of 3,493 Next Last