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 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 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 301st pardouin 🇫🇷 919 72 3,105ms 21 May 2025 302nd Lydxn 🇨🇦 918 70 96ms 7 May 2022 302nd JayXon 🇺🇸 918 70 96ms 7 May 2022 304th JayXon 🇺🇸 918 79 570ms 5 Apr 2023 304th Lydxn 🇨🇦 918 79 543ms 9 Apr 2023 306th primo-ppcg 🇹🇭 917 61 6ms 6 May 2022 306th sisyphus-ppcg 🇦🇺 917 61 9ms 14 Jul 2022 308th Steffan153 🇫🇮 917 71 100ms 14 Oct 2022 308th Shanethegamer 🇺🇸 917 71 100ms 15 Oct 2022 308th stefangimmillaro 917 71 99ms 16 Oct 2022 308th MeWhenI 🇻🇦 917 71 101ms 16 Oct 2022 308th Steffan153 🇫🇮 917 71 4ms 10 Dec 2022 308th synt7x 🇺🇸 917 71 4ms 7 Jul 2025 314th annaproxy 917 79 118ms 24 Aug 2022 314th GrayJoKing 🇦🇺 917 79 83ms 28 Aug 2022 314th IanUtley 917 79 114ms 3 Nov 2023 314th Kacarott 🇦🇺 917 79 117ms 13 Jun 2024 318th Steffan153 🇫🇮 917 81 24ms 11 Dec 2023 319th arctouch-cristiannevianna 916 85 321ms 3 Apr 2023 319th tomtheisen 🇺🇸 916 85 344ms 10 Apr 2025 321st Shanethegamer 🇺🇸 916 87 390ms 15 May 2023 321st JayXon 🇺🇸 916 87 508ms 15 May 2023 321st Steffan153 🇫🇮 916 87 389ms 16 May 2023 321st Lydxn 🇨🇦 916 87 465ms 16 May 2023 321st GrayJoKing 🇦🇺 916 87 400ms 11 Aug 2023 321st sean-niemann 🇺🇸 916 87 458ms 11 Jul 2024 327th kmathis22 916 91 354ms 17 days ago 328th Natanaelel 🇸🇪 915 57 462ms 17 Jan 2024 328th Kacarott 🇦🇺 915 57 566ms 10 Sep 2024 330th Shanethegamer 🇺🇸 915 61 4ms 9 Oct 2023 330th edsrzf 🇳🇿 915 61 4ms 4 Jul 2025 332nd ovs-code 🇩🇪 915 75 74ms 12 Sep 2024 332nd Kacarott 🇦🇺 915 75 78ms 13 Sep 2024 334th Lydxn 🇨🇦 914 81 45ms 1 Apr 2023 335th andersk 🇺🇸 914 91 120ms 25 Oct 2022 335th Super-Pizza 🇨🇦 914 91 127ms 4 Dec 2022 335th klixel 🇨🇦 914 91 121ms 20 May 2023 335th lynn 914 91 127ms 6 Jul 2024 335th edsrzf 🇳🇿 914 91 124ms 29 Nov 2024 335th DialFrost 🇸🇬 914 91 120ms 7 Apr 2025 341st lynn 913 78 1,328ms 5 May 2022 342nd tailorspy 912 93 55ms 27 May 2024 342nd sean-niemann 🇺🇸 912 93 57ms 9 Jun 2025 342nd KasperKivimaeki 🇫🇮 912 93 56ms 26 Oct 2025 345th nai62 911 69 7ms 27 Aug 2022 346th GrayJoKing 🇦🇺 911 71 289ms 10 Aug 2023 347th GolfingSuccess 🇬🇷 910 64 86ms 14 Dec 2024 347th MeWhenI 🇻🇦 910 64 92ms 24 Dec 2024 347th GrayJoKing 🇦🇺 910 64 86ms 11 days ago 350th Shanethegamer 🇺🇸 910 77 12ms 15 May 2023 351st primo-ppcg 🇹🇭 910 93 42ms 7 May 2022 351st AlephSquirrel 910 93 30ms 21 Jan 2023 351st kg583 🇺🇸 910 93 29ms 26 Dec 2024 351st CLOStrophobic 🇮🇹 910 93 31ms 17 Jan 2025 351st edsrzf 🇳🇿 910 93 30ms 3 Jul 2025 356th MeWhenI 🇻🇦 909 63 195ms 5 May 2022 357th Lydxn 🇨🇦 909 68 431ms 5 May 2022 357th GrayJoKing 🇦🇺 909 68 16ms 15 Nov 2022 357th Bubbler-4 909 68 15ms 15 Nov 2022 357th Rubiksmath 909 68 15ms 14 Aug 2023 361st edsrzf 🇳🇿 909 72 127ms 3 Jul 2025 362nd marshallward 🇺🇸 909 83 46ms 10 May 2022 363rd ovs-code 🇩🇪 909 84 63ms 25 Sep 2022 363rd GrayJoKing 🇦🇺 909 84 66ms 11 Aug 2023 363rd edsrzf 🇳🇿 909 84 78ms 25 days ago 366th Betuaredead 908 60 6ms 5 Jan 2023 366th Yewzir 🇧🇪 908 60 5ms 12 Feb 2023 366th Steffan153 🇫🇮 908 60 5ms 23 Feb 2023 366th DialFrost 🇸🇬 908 60 5ms 30 Jul 2024 366th GolfingSuccess 🇬🇷 908 60 5ms 16 Oct 2024 366th sean-niemann 🇺🇸 908 60 12ms 7 Mar 2025 372nd DialFrost 🇸🇬 908 76 198ms 3 Aug 2025 373rd edsrzf 🇳🇿 908 83 41ms 14 Jan 2025 373rd kg583 🇺🇸 908 83 39ms 14 Feb 2025 375th m-tkach 🇺🇦 908 90 31ms 7 Dec 2023 First Prev 301–375 of 3,509 Next Last