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 547th zakariamouhid 892 60 10ms 20 May 2023 547th raphaelimahorn 892 60 10ms 23 Aug 2023 547th jbt 892 60 12ms 25 Dec 2023 547th olleicua 🇺🇸 892 60 12ms 15 Feb 2024 547th HumanoidCPU 892 60 11ms 3 May 2024 547th dokutan 892 60 10ms 13 Aug 2024 547th LostSyntax21 🇬🇧 892 60 13ms 10 Sep 2024 547th xyangst 892 60 11ms 28 Sep 2024 547th a6166231 🇨🇳 892 60 12ms 15 May 2025 547th SebassNoob 892 60 12ms 5 Aug 2025 547th levinwinter 892 60 11ms 22 Oct 2025 547th Cube14yt 892 60 11ms 16 Nov 2025 547th gigaprofisi 🇺🇸 892 60 11ms 17 Nov 2025 547th amazingalek 🇳🇴 892 60 13ms 20 Dec 2025 547th shandriy 892 60 11ms 23 Jan 2026 547th spidunno 892 60 12ms 17 Feb 2026 577th lynn 892 65 267ms 5 May 2022 577th GrayJoKing 🇦🇺 892 65 250ms 5 May 2022 577th Sakisan 🇧🇪 892 65 178ms 6 May 2022 577th JayXon 🇺🇸 892 65 271ms 17 Oct 2022 577th Steffan153 🇫🇮 892 65 181ms 12 Nov 2022 577th tobeannouncd 892 65 302ms 25 Apr 2025 577th sean-niemann 🇺🇸 892 65 168ms 9 Jun 2025 584th GrayJoKing 🇦🇺 892 77 76ms 13 Sep 2024 585th DialFrost 🇸🇬 892 95 30ms 10 Dec 2024 586th canissimia 🇦🇶 892 204 16ms 25 Nov 2023 587th ovs-code 🇩🇪 890 73 340ms 22 Jul 2023 588th primo-ppcg 🇹🇭 890 85 39ms 14 Jan 2025 588th MeWhenI 🇻🇦 890 85 41ms 21 Apr 2025 590th m-tkach 🇺🇦 890 112 116ms 22 Jun 2025 591st mousetail 🇳🇱 889 41 66ms 29 Aug 2025 592nd MeWhenI 🇻🇦 889 53 39ms 1 Jun 2022 592nd stefangimmillaro 889 53 39ms 2 Oct 2022 592nd Haksell 🇦🇶 889 53 39ms 22 Feb 2023 595th janbehrens 🇩🇪 888 90 467ms 21 Apr 2023 595th Yewzir 🇧🇪 888 90 459ms 22 Apr 2023 595th Ripick 888 90 459ms 27 Nov 2024 595th emgordon154 888 90 441ms 10 Dec 2025 599th albanian-laundromat 🇺🇸 888 94 486ms 24 Sep 2025 599th jkelly467 888 94 401ms 23 Oct 2025 599th HumanoidCPU 888 94 479ms 8 Nov 2025 602nd steffan-polygolf 887 74 132ms 14 Feb 2024 602nd prestosilver 🇺🇸 887 74 134ms 18 Dec 2025 604th frosster 🇨🇦 887 77 5ms 8 Feb 2026 605th Shanethegamer 🇺🇸 887 82 18ms 19 Dec 2023 605th edsrzf 🇳🇿 887 82 17ms 6 Jan 2025 607th GolfingSuccess 🇬🇷 886 71 2ms 5 May 2022 607th emplv 🇱🇻 886 71 2ms 5 May 2022 607th JayXon 🇺🇸 886 71 2ms 7 May 2022 607th nwellnhof 🇩🇪 886 71 2ms 5 Jun 2022 607th stefangimmillaro 886 71 2ms 2 Jun 2023 607th 09cf 886 71 7ms 4 Oct 2023 607th kkoenig 886 71 2ms 21 Dec 2023 607th sean-niemann 🇺🇸 886 71 2ms 10 Jul 2024 607th masinag 🇮🇹 886 71 2ms 6 Oct 2024 616th Steffan153 🇫🇮 886 75 2,579ms 11 days ago 617th SiestaGuru 886 88 371ms 9 Jan 2023 617th rifatx 886 88 376ms 5 Jul 2024 617th kmathis22 886 88 371ms 25 Sep 2025 620th m-tkach 🇺🇦 885 59 428ms 21 Jan 2024 620th GolfingSuccess 🇬🇷 885 59 475ms 20 Jan 2025 620th duckyluuk 🇳🇱 885 59 528ms 4 Dec 2025 623rd nipzu 885 94 126ms 17 May 2022 623rd Natanaelel 🇸🇪 885 94 126ms 17 Jun 2022 623rd nkoppel 885 94 122ms 19 Oct 2022 623rd ovs-code 🇩🇪 885 94 126ms 21 Jun 2023 623rd mousetail 🇳🇱 885 94 126ms 12 Jan 2024 628th Irratix 🇳🇱 885 96 62ms 4 May 2022 628th MeWhenI 🇻🇦 885 96 59ms 1 Jun 2022 628th janbehrens 🇩🇪 885 96 61ms 21 Apr 2023 628th Shanethegamer 🇺🇸 885 96 58ms 15 May 2023 628th Yewzir 🇧🇪 885 96 72ms 11 Nov 2023 628th MateuszPietrzak 🇵🇱 885 96 60ms 18 Nov 2023 628th kkoenig 885 96 62ms 21 Dec 2023 628th BlankSpruce 885 96 62ms 20 Aug 2024 628th fuzzylojik-golf 🇻🇦 885 96 60ms 14 Jun 2025 628th dokutan 885 96 60ms 8 Feb 2026 638th emgordon154 885 97 117ms 3 Dec 2025 639th sean-niemann 🇺🇸 885 109 335ms 25 May 2024 639th GolfingSuccess 🇬🇷 885 109 340ms 6 Sep 2025 First Prev 561–640 of 3,752 Next Last