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 318th Lydxn 🇨🇦 919 79 556ms 9 Apr 2023 318th IanUtley 919 79 115ms 3 Nov 2023 318th Kacarott 🇦🇺 919 79 121ms 13 Jun 2024 324th primo-ppcg 🇹🇭 918 61 7ms 6 May 2022 324th sisyphus-ppcg 🇦🇺 918 61 10ms 14 Jul 2022 326th Mukundan314 918 65 661ms 11 days ago 327th Steffan153 🇫🇮 918 71 110ms 14 Oct 2022 327th Shanethegamer 🇺🇸 918 71 109ms 15 Oct 2022 327th stefangimmillaro 918 71 110ms 16 Oct 2022 327th MeWhenI 🇻🇦 918 71 113ms 16 Oct 2022 331st Shanethegamer 🇺🇸 918 87 461ms 15 May 2023 331st JayXon 🇺🇸 918 87 481ms 15 May 2023 331st Steffan153 🇫🇮 918 87 460ms 16 May 2023 331st Lydxn 🇨🇦 918 87 456ms 16 May 2023 331st GrayJoKing 🇦🇺 918 87 461ms 11 Aug 2023 331st sean-niemann 🇺🇸 918 87 468ms 11 Jul 2024 337th JayXon 🇺🇸 918 105 360ms 4 Oct 2025 338th Lydxn 🇨🇦 917 81 39ms 1 Apr 2023 339th arctouch-cristiannevianna 917 85 418ms 3 Apr 2023 339th tomtheisen 🇺🇸 917 85 407ms 10 Apr 2025 341st kmathis22 917 91 471ms 20 Nov 2025 342nd Natanaelel 🇸🇪 916 57 453ms 17 Jan 2024 342nd Kacarott 🇦🇺 916 57 461ms 10 Sep 2024 344th Shanethegamer 🇺🇸 916 61 4ms 9 Oct 2023 345th ovs-code 🇩🇪 916 75 67ms 12 Sep 2024 345th Kacarott 🇦🇺 916 75 62ms 13 Sep 2024 347th GolfingSuccess 🇬🇷 915 64 90ms 14 Dec 2024 347th MeWhenI 🇻🇦 915 64 93ms 24 Dec 2024 347th GrayJoKing 🇦🇺 915 64 88ms 25 Nov 2025 347th Steffan153 🇫🇮 915 64 84ms 13 mins ago 351st GrayJoKing 🇦🇺 915 71 321ms 10 Aug 2023 352nd edsrzf 🇳🇿 914 52 1,094ms 9 Mar 2026 353rd andersk 🇺🇸 914 91 133ms 25 Oct 2022 353rd Super-Pizza 🇨🇦 914 91 120ms 4 Dec 2022 353rd klixel 🇨🇦 914 91 124ms 20 May 2023 353rd lynn 914 91 128ms 6 Jul 2024 353rd edsrzf 🇳🇿 914 91 124ms 29 Nov 2024 353rd DialFrost 🇸🇬 914 91 130ms 7 Apr 2025 353rd elgan65536 🇺🇸 914 91 131ms 10 Feb 2026 353rd fantaize 914 91 133ms 10 Mar 2026 353rd snoozingnewt 🇨🇦 914 91 137ms 21 days ago 362nd tailorspy 914 93 55ms 27 May 2024 362nd sean-niemann 🇺🇸 914 93 62ms 9 Jun 2025 362nd KasperKivimaeki 🇫🇮 914 93 63ms 26 Oct 2025 365th nai62 912 69 7ms 27 Aug 2022 366th Steffan153 🇫🇮 912 81 1,429ms 8 days ago 367th MeWhenI 🇻🇦 911 63 209ms 5 May 2022 368th edsrzf 🇳🇿 911 72 131ms 3 Jul 2025 369th sean-niemann 🇺🇸 911 75 5ms 23 Dec 2025 369th Steffan153 🇫🇮 911 75 5ms 11 Feb 2026 371st marshallward 🇺🇸 911 83 40ms 10 May 2022 372nd ovs-code 🇩🇪 911 84 65ms 25 Sep 2022 372nd GrayJoKing 🇦🇺 911 84 65ms 11 Aug 2023 372nd edsrzf 🇳🇿 911 84 65ms 12 Nov 2025 372nd Steffan153 🇫🇮 911 84 68ms 26 Feb 2026 376th primo-ppcg 🇹🇭 911 93 32ms 7 May 2022 376th AlephSquirrel 911 93 29ms 21 Jan 2023 376th kg583 🇺🇸 911 93 32ms 26 Dec 2024 376th CLOStrophobic 🇮🇹 911 93 43ms 17 Jan 2025 376th edsrzf 🇳🇿 911 93 36ms 3 Jul 2025 381st Lydxn 🇨🇦 910 68 15ms 5 May 2022 381st GrayJoKing 🇦🇺 910 68 18ms 15 Nov 2022 381st Bubbler-4 910 68 15ms 15 Nov 2022 381st Rubiksmath 910 68 17ms 14 Aug 2023 381st Languag3 910 68 16ms 1 Mar 2026 386th Shanethegamer 🇺🇸 910 77 14ms 15 May 2023 387th m-tkach 🇺🇦 910 90 31ms 7 Dec 2023 388th Betuaredead 909 60 4ms 5 Jan 2023 388th Yewzir 🇧🇪 909 60 4ms 12 Feb 2023 388th Steffan153 🇫🇮 909 60 4ms 23 Feb 2023 388th GolfingSuccess 🇬🇷 909 60 4ms 16 Oct 2024 388th sean-niemann 🇺🇸 909 60 9ms 7 Mar 2025 393rd edsrzf 🇳🇿 909 83 41ms 14 Jan 2025 393rd kg583 🇺🇸 909 83 42ms 14 Feb 2025 395th Steffan153 🇫🇮 908 80 28ms 15 Nov 2022 395th error256 908 80 117ms 8 Apr 2025 395th kg583 🇺🇸 908 80 19ms 11 Mar 2026 398th nipzu 907 48 56ms 8 Sep 2024 399th KrausRaus 🇺🇸 907 59 11ms 4 May 2022 399th voytxt 🇨🇿 907 59 10ms 4 May 2022 First Prev 321–400 of 3,779 Next Last