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 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 Gray Code Decoder Gray Code Encoder 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 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 ArkScript 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 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 ArkScript 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 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 Gray Code Decoder Gray Code Encoder 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 gblikas 939 83 473ms 23 Jul 2023 150th KrausRaus 🇺🇸 939 83 392ms 31 Jul 2023 150th namelessiw 939 83 396ms 9 Apr 2025 150th dokutan 939 83 391ms 9 Apr 2025 150th m-tkach 🇺🇦 939 83 411ms 10 Apr 2025 150th DialFrost 🇸🇬 939 83 401ms 10 Apr 2025 150th kylejcwu 939 83 374ms 19 Apr 2025 150th Tyrant7 939 83 409ms 19 Apr 2025 150th Yax42 🇫🇷 939 83 442ms 19 Apr 2025 150th MeWhenI 🇻🇦 939 83 378ms 19 Jun 2025 150th sean-niemann 🇺🇸 939 83 400ms 20 Jun 2025 150th stefangimmillaro 939 83 391ms 20 Jun 2025 150th tomh1012 939 83 456ms 28 Aug 2025 150th fuzzylojik-golf 🇺🇸 939 83 389ms 8 Sep 2025 150th CaedenHarper 🇨🇦 939 83 377ms 17 Oct 2025 150th arcpolaris 939 83 583ms 13 Jan 2026 150th amazingalek 🇳🇴 939 83 450ms 21 Jan 2026 178th grey0ut 937 48 2,160ms 8 Apr 2025 179th GolfingSuccess 🇬🇷 937 49 38ms 12 Aug 2024 179th Shanethegamer 🇺🇸 937 49 39ms 12 Aug 2024 179th Steffan153 🇫🇮 937 49 39ms 12 Aug 2024 179th MeWhenI 🇻🇦 937 49 37ms 13 Aug 2024 179th DialFrost 🇸🇬 937 49 38ms 13 Aug 2024 179th GrayJoKing 🇦🇺 937 49 41ms 15 Aug 2024 179th btnlq 937 49 39ms 16 Aug 2024 179th emgordon154 937 49 41ms 19 Aug 2024 179th ovs-code 🇩🇪 937 49 39ms 19 Aug 2024 179th mousetail 🇳🇱 937 49 39ms 13 Sep 2024 179th lynn 937 49 39ms 20 Dec 2024 179th weeble 937 49 40ms 20 Dec 2024 179th sean-niemann 🇺🇸 937 49 39ms 11 Jan 2025 192nd JayXon 🇺🇸 937 66 1,308ms 18 Nov 2025 193rd DialFrost 🇸🇬 937 89 513ms 24 Sep 2025 193rd ovs-code 🇩🇪 937 89 474ms 24 Sep 2025 193rd dokutan 937 89 372ms 24 Sep 2025 193rd sean-niemann 🇺🇸 937 89 397ms 24 Sep 2025 193rd Shanethegamer 🇺🇸 937 89 477ms 25 Sep 2025 193rd nwellnhof 🇩🇪 937 89 454ms 25 Sep 2025 193rd m-tkach 🇺🇦 937 89 386ms 25 Sep 2025 193rd namelessiw 937 89 390ms 2 Oct 2025 193rd Yewzir 🇧🇪 937 89 349ms 2 Oct 2025 193rd Yax42 🇫🇷 937 89 496ms 4 Oct 2025 193rd stefangimmillaro 937 89 489ms 6 Oct 2025 193rd CaedenHarper 🇨🇦 937 89 467ms 9 Oct 2025 193rd Jacob385 937 89 491ms 27 Oct 2025 193rd MeWhenI 🇻🇦 937 89 449ms 7 Nov 2025 193rd ethanlally 937 89 380ms 10 Nov 2025 193rd snoozingnewt 🇨🇦 937 89 384ms 23 Nov 2025 193rd ScottHamper 937 89 467ms 30 Nov 2025 193rd KasperKivimaeki 🇫🇮 937 89 444ms 30 Nov 2025 211th JayXon 🇺🇸 935 73 4ms 23 Dec 2025 212th nwellnhof 🇩🇪 933 42 377ms 4 May 2022 212th Lydxn 🇨🇦 933 42 1,544ms 4 May 2022 212th GrayJoKing 🇦🇺 933 42 373ms 4 May 2022 212th Steffan153 🇫🇮 933 42 368ms 16 Dec 2022 212th sisyphus-ppcg 🇦🇺 933 42 347ms 31 Jan 2023 212th ovs-code 🇩🇪 933 42 371ms 30 Dec 2023 212th sean-niemann 🇺🇸 933 42 358ms 8 Mar 2025 219th emplv 🇱🇻 933 60 11ms 5 May 2022 219th GrayJoKing 🇦🇺 933 60 10ms 6 May 2022 219th targrik 933 60 9ms 24 Dec 2024 219th xsot 🇸🇬 933 60 11ms 1 May 2025 223rd m-tkach 🇺🇦 933 91 62ms 5 May 2022 223rd 09cf 933 91 62ms 4 Oct 2023 225th GrayJoKing 🇦🇺 932 56 437ms 15 Jan 2024 225th AlephSquirrel 932 56 396ms 21 Jan 2024 225th CaedenHarper 🇨🇦 932 56 484ms 26 Jan 2026 228th ovs-code 🇩🇪 931 60 5ms 9 Oct 2023 228th GrayJoKing 🇦🇺 931 60 4ms 11 Oct 2023 228th Lydxn 🇨🇦 931 60 4ms 11 Oct 2023 228th GolfingSuccess 🇬🇷 931 60 4ms 16 Nov 2023 228th Steffan153 🇫🇮 931 60 4ms 28 Jan 2024 228th JayXon 🇺🇸 931 60 4ms 29 Jan 2024 228th rucin93 🇵🇱 931 60 5ms 10 Jul 2024 228th sean-niemann 🇺🇸 931 60 5ms 10 Jul 2024 228th edsrzf 🇳🇿 931 60 5ms 5 days ago 237th MeWhenI 🇻🇦 931 68 91ms 23 Feb 2023 237th JayXon 🇺🇸 931 68 94ms 4 Mar 2025 239th Lydxn 🇨🇦 930 70 110ms 17 Oct 2022 239th JayXon 🇺🇸 930 70 120ms 17 Oct 2022 First Prev 161–240 of 3,626 Next Last