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 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 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 Lydxn 🇨🇦 918 70 96ms 7 May 2022 301st JayXon 🇺🇸 918 70 96ms 7 May 2022 303rd JayXon 🇺🇸 918 79 583ms 5 Apr 2023 303rd Lydxn 🇨🇦 918 79 578ms 9 Apr 2023 305th primo-ppcg 🇹🇭 917 61 6ms 6 May 2022 305th sisyphus-ppcg 🇦🇺 917 61 9ms 14 Jul 2022 307th Steffan153 🇫🇮 917 71 108ms 14 Oct 2022 307th Shanethegamer 🇺🇸 917 71 111ms 15 Oct 2022 307th stefangimmillaro 917 71 103ms 16 Oct 2022 307th MeWhenI 🇻🇦 917 71 102ms 16 Oct 2022 307th Steffan153 🇫🇮 917 71 6ms 10 Dec 2022 307th synt7x 🇺🇸 917 71 4ms 7 Jul 2025 313th annaproxy 917 79 128ms 24 Aug 2022 313th GrayJoKing 🇦🇺 917 79 89ms 28 Aug 2022 313th IanUtley 917 79 119ms 3 Nov 2023 313th Kacarott 🇦🇺 917 79 135ms 13 Jun 2024 317th Steffan153 🇫🇮 917 81 24ms 11 Dec 2023 318th arctouch-cristiannevianna 916 85 321ms 3 Apr 2023 318th tomtheisen 🇺🇸 916 85 344ms 10 Apr 2025 320th Shanethegamer 🇺🇸 916 87 390ms 15 May 2023 320th JayXon 🇺🇸 916 87 508ms 15 May 2023 320th Steffan153 🇫🇮 916 87 389ms 16 May 2023 320th Lydxn 🇨🇦 916 87 465ms 16 May 2023 320th GrayJoKing 🇦🇺 916 87 400ms 11 Aug 2023 320th sean-niemann 🇺🇸 916 87 458ms 11 Jul 2024 326th kmathis22 916 91 354ms 11 days ago 327th Natanaelel 🇸🇪 915 57 474ms 17 Jan 2024 327th Kacarott 🇦🇺 915 57 425ms 10 Sep 2024 329th Shanethegamer 🇺🇸 915 61 4ms 9 Oct 2023 329th edsrzf 🇳🇿 915 61 4ms 4 Jul 2025 331st ovs-code 🇩🇪 915 75 74ms 12 Sep 2024 331st Kacarott 🇦🇺 915 75 78ms 13 Sep 2024 333rd Lydxn 🇨🇦 914 81 45ms 1 Apr 2023 334th andersk 🇺🇸 914 91 120ms 25 Oct 2022 334th Super-Pizza 🇨🇦 914 91 127ms 4 Dec 2022 334th klixel 🇨🇦 914 91 121ms 20 May 2023 334th lynn 914 91 127ms 6 Jul 2024 334th edsrzf 🇳🇿 914 91 124ms 29 Nov 2024 334th DialFrost 🇸🇬 914 91 122ms 7 Apr 2025 340th lynn 913 78 1,328ms 5 May 2022 341st tailorspy 912 93 53ms 27 May 2024 341st sean-niemann 🇺🇸 912 93 54ms 9 Jun 2025 341st KasperKivimaeki 🇫🇮 912 93 54ms 26 Oct 2025 344th nai62 911 69 7ms 27 Aug 2022 345th GrayJoKing 🇦🇺 911 71 289ms 10 Aug 2023 346th GolfingSuccess 🇬🇷 910 64 86ms 14 Dec 2024 346th MeWhenI 🇻🇦 910 64 92ms 24 Dec 2024 346th GrayJoKing 🇦🇺 910 64 86ms 5 days ago 349th Shanethegamer 🇺🇸 910 77 12ms 15 May 2023 350th primo-ppcg 🇹🇭 910 93 42ms 7 May 2022 350th AlephSquirrel 910 93 30ms 21 Jan 2023 350th kg583 🇺🇸 910 93 29ms 26 Dec 2024 350th CLOStrophobic 🇮🇹 910 93 31ms 17 Jan 2025 350th edsrzf 🇳🇿 910 93 30ms 3 Jul 2025 355th MeWhenI 🇻🇦 909 63 206ms 5 May 2022 356th Lydxn 🇨🇦 909 68 437ms 5 May 2022 356th GrayJoKing 🇦🇺 909 68 15ms 15 Nov 2022 356th Bubbler-4 909 68 15ms 15 Nov 2022 356th Rubiksmath 909 68 15ms 14 Aug 2023 360th edsrzf 🇳🇿 909 72 127ms 3 Jul 2025 361st marshallward 🇺🇸 909 83 46ms 10 May 2022 362nd ovs-code 🇩🇪 909 84 65ms 25 Sep 2022 362nd GrayJoKing 🇦🇺 909 84 65ms 11 Aug 2023 362nd edsrzf 🇳🇿 909 84 80ms 19 days ago 365th Betuaredead 908 60 6ms 5 Jan 2023 365th Yewzir 🇧🇪 908 60 5ms 12 Feb 2023 365th Steffan153 🇫🇮 908 60 5ms 23 Feb 2023 365th DialFrost 🇸🇬 908 60 5ms 30 Jul 2024 365th GolfingSuccess 🇬🇷 908 60 5ms 16 Oct 2024 365th sean-niemann 🇺🇸 908 60 12ms 7 Mar 2025 371st DialFrost 🇸🇬 908 76 198ms 3 Aug 2025 372nd edsrzf 🇳🇿 908 83 41ms 14 Jan 2025 372nd kg583 🇺🇸 908 83 39ms 14 Feb 2025 374th m-tkach 🇺🇦 908 90 31ms 7 Dec 2023 375th KrausRaus 🇺🇸 907 59 9ms 4 May 2022 First Prev 301–375 of 3,498 Next Last