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 Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript 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 APL 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 ><> ALGOL 68 ArkScript 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 APL 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 Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 317th IanUtley 919 79 115ms 3 Nov 2023 317th Kacarott 🇦🇺 919 79 121ms 13 Jun 2024 323rd primo-ppcg 🇹🇭 918 61 7ms 6 May 2022 323rd sisyphus-ppcg 🇦🇺 918 61 10ms 14 Jul 2022 325th Mukundan314 918 65 661ms 10 days ago 326th Steffan153 🇫🇮 918 71 110ms 14 Oct 2022 326th Shanethegamer 🇺🇸 918 71 109ms 15 Oct 2022 326th stefangimmillaro 918 71 110ms 16 Oct 2022 326th MeWhenI 🇻🇦 918 71 113ms 16 Oct 2022 330th Shanethegamer 🇺🇸 918 87 461ms 15 May 2023 330th JayXon 🇺🇸 918 87 481ms 15 May 2023 330th Steffan153 🇫🇮 918 87 460ms 16 May 2023 330th Lydxn 🇨🇦 918 87 456ms 16 May 2023 330th GrayJoKing 🇦🇺 918 87 461ms 11 Aug 2023 330th sean-niemann 🇺🇸 918 87 468ms 11 Jul 2024 336th JayXon 🇺🇸 918 105 360ms 4 Oct 2025 337th Lydxn 🇨🇦 917 81 39ms 1 Apr 2023 338th arctouch-cristiannevianna 917 85 418ms 3 Apr 2023 338th tomtheisen 🇺🇸 917 85 407ms 10 Apr 2025 340th kmathis22 917 91 370ms 20 Nov 2025 341st Natanaelel 🇸🇪 916 57 453ms 17 Jan 2024 341st Kacarott 🇦🇺 916 57 461ms 10 Sep 2024 343rd Shanethegamer 🇺🇸 916 61 4ms 9 Oct 2023 344th ovs-code 🇩🇪 916 75 67ms 12 Sep 2024 344th Kacarott 🇦🇺 916 75 62ms 13 Sep 2024 346th GrayJoKing 🇦🇺 915 71 321ms 10 Aug 2023 347th edsrzf 🇳🇿 914 52 977ms 9 Mar 2026 348th GolfingSuccess 🇬🇷 914 64 90ms 14 Dec 2024 348th MeWhenI 🇻🇦 914 64 93ms 24 Dec 2024 348th GrayJoKing 🇦🇺 914 64 88ms 25 Nov 2025 351st andersk 🇺🇸 914 91 133ms 25 Oct 2022 351st Super-Pizza 🇨🇦 914 91 120ms 4 Dec 2022 351st klixel 🇨🇦 914 91 124ms 20 May 2023 351st lynn 914 91 128ms 6 Jul 2024 351st edsrzf 🇳🇿 914 91 124ms 29 Nov 2024 351st DialFrost 🇸🇬 914 91 130ms 7 Apr 2025 351st elgan65536 🇺🇸 914 91 131ms 10 Feb 2026 351st fantaize 914 91 133ms 10 Mar 2026 351st snoozingnewt 🇨🇦 914 91 137ms 20 days ago 360th tailorspy 914 93 55ms 27 May 2024 360th sean-niemann 🇺🇸 914 93 62ms 9 Jun 2025 360th KasperKivimaeki 🇫🇮 914 93 63ms 26 Oct 2025 363rd nai62 912 69 7ms 27 Aug 2022 364th Steffan153 🇫🇮 912 81 1,429ms 6 days ago 365th MeWhenI 🇻🇦 911 63 209ms 5 May 2022 366th edsrzf 🇳🇿 911 72 128ms 3 Jul 2025 367th sean-niemann 🇺🇸 911 75 5ms 23 Dec 2025 367th Steffan153 🇫🇮 911 75 5ms 11 Feb 2026 369th marshallward 🇺🇸 911 83 40ms 10 May 2022 370th ovs-code 🇩🇪 911 84 65ms 25 Sep 2022 370th GrayJoKing 🇦🇺 911 84 65ms 11 Aug 2023 370th edsrzf 🇳🇿 911 84 65ms 12 Nov 2025 370th Steffan153 🇫🇮 911 84 68ms 26 Feb 2026 374th primo-ppcg 🇹🇭 911 93 32ms 7 May 2022 374th AlephSquirrel 911 93 29ms 21 Jan 2023 374th kg583 🇺🇸 911 93 32ms 26 Dec 2024 374th CLOStrophobic 🇮🇹 911 93 43ms 17 Jan 2025 374th edsrzf 🇳🇿 911 93 36ms 3 Jul 2025 379th Lydxn 🇨🇦 910 68 15ms 5 May 2022 379th GrayJoKing 🇦🇺 910 68 18ms 15 Nov 2022 379th Bubbler-4 910 68 15ms 15 Nov 2022 379th Rubiksmath 910 68 17ms 14 Aug 2023 379th Languag3 910 68 16ms 1 Mar 2026 384th Shanethegamer 🇺🇸 910 77 14ms 15 May 2023 385th m-tkach 🇺🇦 910 90 31ms 7 Dec 2023 386th Betuaredead 909 60 4ms 5 Jan 2023 386th Yewzir 🇧🇪 909 60 4ms 12 Feb 2023 386th Steffan153 🇫🇮 909 60 4ms 23 Feb 2023 386th GolfingSuccess 🇬🇷 909 60 4ms 16 Oct 2024 386th sean-niemann 🇺🇸 909 60 9ms 7 Mar 2025 391st edsrzf 🇳🇿 909 83 41ms 14 Jan 2025 391st kg583 🇺🇸 909 83 42ms 14 Feb 2025 393rd Steffan153 🇫🇮 908 80 28ms 15 Nov 2022 393rd error256 908 80 117ms 8 Apr 2025 393rd kg583 🇺🇸 908 80 19ms 11 Mar 2026 396th nipzu 907 48 56ms 8 Sep 2024 397th KrausRaus 🇺🇸 907 59 11ms 4 May 2022 397th voytxt 🇨🇿 907 59 10ms 4 May 2022 397th KingSkyrock 🇺🇸 907 59 14ms 18 May 2022 397th ZakkkkAttackkkk 🇵🇭 907 59 11ms 14 Jul 2022 First Prev 321–400 of 3,774 Next Last