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 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 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 150th CaedenHarper 🇨🇦 939 57 11ms 28 Sep 2025 150th BrunoVisnadi 🇧🇷 939 57 10ms 21 Oct 2025 150th Laellekoenig 939 57 11ms 22 Oct 2025 150th madex 🇩🇪 939 57 13ms 25 days ago 165th Irratix 🇳🇱 939 83 388ms 4 May 2022 165th nwellnhof 🇩🇪 939 83 383ms 4 May 2022 165th ScottHamper 939 83 380ms 5 May 2022 165th Romain-1 🇫🇷 939 83 381ms 1 Jun 2022 165th Gaddy 🇫🇷 939 83 359ms 1 Jun 2022 165th 5quiwyrm 939 83 379ms 4 Sep 2022 165th Betuaredead 939 83 376ms 5 Jan 2023 165th Yewzir 🇧🇪 939 83 365ms 12 Feb 2023 165th btnlq 939 83 388ms 9 Mar 2023 165th Adix-null 🇱🇹 939 83 385ms 17 May 2023 165th AdrienHache 🇫🇷 939 83 395ms 8 Jun 2023 165th gblikas 939 83 412ms 23 Jul 2023 165th KrausRaus 🇺🇸 939 83 392ms 31 Jul 2023 165th namelessiw 939 83 379ms 9 Apr 2025 165th dokutan 939 83 387ms 9 Apr 2025 165th m-tkach 🇺🇦 939 83 389ms 10 Apr 2025 165th DialFrost 🇸🇬 939 83 401ms 10 Apr 2025 165th kylejcwu 939 83 374ms 19 Apr 2025 165th Tyrant7 939 83 381ms 19 Apr 2025 165th Yax42 🇫🇷 939 83 394ms 19 Apr 2025 165th MeWhenI 🇻🇦 939 83 378ms 19 Jun 2025 165th sean-niemann 🇺🇸 939 83 390ms 20 Jun 2025 165th stefangimmillaro 939 83 372ms 20 Jun 2025 165th tomh1012 939 83 376ms 28 Aug 2025 165th fuzzylojik-golf 🇺🇸 939 83 389ms 8 Sep 2025 165th CaedenHarper 🇨🇦 939 83 377ms 17 Oct 2025 165th arcpolaris 939 83 396ms 13 Jan 2026 165th amazingalek 🇳🇴 939 83 403ms 21 Jan 2026 193rd grey0ut 938 48 2,086ms 8 Apr 2025 194th JayXon 🇺🇸 937 66 1,468ms 18 Nov 2025 195th DialFrost 🇸🇬 937 89 441ms 24 Sep 2025 195th ovs-code 🇩🇪 937 89 454ms 24 Sep 2025 195th dokutan 937 89 372ms 24 Sep 2025 195th sean-niemann 🇺🇸 937 89 397ms 24 Sep 2025 195th Shanethegamer 🇺🇸 937 89 477ms 25 Sep 2025 195th nwellnhof 🇩🇪 937 89 454ms 25 Sep 2025 195th m-tkach 🇺🇦 937 89 386ms 25 Sep 2025 195th namelessiw 937 89 390ms 2 Oct 2025 195th Yewzir 🇧🇪 937 89 349ms 2 Oct 2025 195th Yax42 🇫🇷 937 89 467ms 4 Oct 2025 195th stefangimmillaro 937 89 428ms 6 Oct 2025 195th CaedenHarper 🇨🇦 937 89 467ms 9 Oct 2025 195th Jacob385 937 89 425ms 27 Oct 2025 195th MeWhenI 🇻🇦 937 89 449ms 7 Nov 2025 195th ethanlally 937 89 380ms 10 Nov 2025 195th snoozingnewt 🇨🇦 937 89 384ms 23 Nov 2025 195th ScottHamper 937 89 467ms 30 Nov 2025 195th KasperKivimaeki 🇫🇮 937 89 444ms 30 Nov 2025 213th JayXon 🇺🇸 936 73 4ms 23 Dec 2025 214th vang1ong7ang 935 89 134ms 39 hours ago 215th nwellnhof 🇩🇪 934 42 380ms 4 May 2022 215th Lydxn 🇨🇦 934 42 1,594ms 4 May 2022 215th GrayJoKing 🇦🇺 934 42 396ms 4 May 2022 215th Steffan153 🇫🇮 934 42 387ms 16 Dec 2022 215th sisyphus-ppcg 🇦🇺 934 42 387ms 31 Jan 2023 215th ovs-code 🇩🇪 934 42 379ms 30 Dec 2023 215th sean-niemann 🇺🇸 934 42 385ms 8 Mar 2025 222nd emplv 🇱🇻 934 60 10ms 5 May 2022 222nd GrayJoKing 🇦🇺 934 60 9ms 6 May 2022 222nd targrik 934 60 9ms 24 Dec 2024 222nd xsot 🇸🇬 934 60 10ms 1 May 2025 226th m-tkach 🇺🇦 934 91 59ms 5 May 2022 226th 09cf 934 91 59ms 4 Oct 2023 228th Steffan153 🇫🇮 932 51 1,122ms 21 days ago 229th GrayJoKing 🇦🇺 932 56 470ms 15 Jan 2024 229th AlephSquirrel 932 56 419ms 21 Jan 2024 229th CaedenHarper 🇨🇦 932 56 396ms 26 Jan 2026 232nd ovs-code 🇩🇪 932 60 5ms 9 Oct 2023 232nd GrayJoKing 🇦🇺 932 60 4ms 11 Oct 2023 232nd Lydxn 🇨🇦 932 60 5ms 11 Oct 2023 232nd GolfingSuccess 🇬🇷 932 60 4ms 16 Nov 2023 232nd Steffan153 🇫🇮 932 60 5ms 28 Jan 2024 232nd JayXon 🇺🇸 932 60 4ms 29 Jan 2024 232nd rucin93 🇵🇱 932 60 5ms 10 Jul 2024 232nd sean-niemann 🇺🇸 932 60 5ms 10 Jul 2024 232nd edsrzf 🇳🇿 932 60 5ms 9 Mar 2026 First Prev 161–240 of 3,729 Next Last