Collatz in all languages in bytes. Cheevos Holes Recent Holes Langs Medals Misc 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Binary Lambda Calculus Calendar 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Binary Lambda Calculus Calendar 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Bytes Time Submitted 584th stewSquared 🇺🇸 883 70 19ms 27 Sep 2022 584th orthoplex 🇨🇽 883 70 24ms 9 Oct 2022 584th 5quiwyrm 883 70 18ms 19 Oct 2022 584th myfatemi04 883 70 20ms 4 Nov 2022 584th kevinmchung 883 70 18ms 4 Nov 2022 584th FlorianCassayre 🇫🇷 883 70 18ms 7 Nov 2022 584th fourth-bit 883 70 17ms 29 Nov 2022 584th QuincyNash 🇺🇸 883 70 20ms 29 Nov 2022 584th aksyristos 883 70 19ms 25 Dec 2022 584th thizanne 883 70 19ms 27 Dec 2022 584th Alex-x90 🇺🇸 883 70 21ms 20 Jan 2023 584th bob-th 883 70 19ms 24 Jan 2023 584th SirFireball3521 883 70 15ms 25 Jan 2023 584th stefangimmillaro 883 70 20ms 6 Feb 2023 584th Seek64 🇩🇪 883 70 18ms 7 Feb 2023 584th FieryIceStickie 883 70 20ms 3 Apr 2023 584th MeWhenI 🇻🇦 883 70 19ms 30 Apr 2023 584th fgrosshans 🇫🇷 883 70 18ms 5 May 2023 584th Shanethegamer 🇺🇸 883 70 18ms 25 May 2023 584th InigoK 🇺🇸 883 70 19ms 14 Jun 2023 584th quimey 883 70 16ms 15 Jun 2023 584th CornerMercury 🇬🇧 883 70 19ms 19 Jun 2023 584th ndren 883 70 22ms 2 Aug 2023 584th bizy-coder 883 70 19ms 14 Aug 2023 584th janbehrens 🇩🇪 883 70 21ms 24 Nov 2023 584th namelessiw 883 70 19ms 9 Jan 2024 584th mathisfun271 883 70 19ms 13 Feb 2024 584th Just4FunCoder 883 70 21ms 17 Feb 2024 584th ThijsLuttikhuis 883 70 19ms 3 Mar 2024 584th elgan65536 883 70 19ms 5 Mar 2024 584th jtaxen 883 70 18ms 1 Apr 2024 584th HumanoidCPU 883 70 18ms 6 May 2024 584th abc7-12 883 70 19ms 6 May 2024 584th ahmetdemirag 🇨🇾 883 70 18ms 9 Jun 2024 584th FranklinJiaChen 883 70 19ms 4 Jul 2024 584th 5cw 🇺🇸 883 70 18ms 13 Jul 2024 584th CaedenHarper 🇨🇦 883 70 19ms 3 Aug 2024 584th emgordon154 883 70 18ms 5 Aug 2024 584th dokutan 883 70 20ms 9 Aug 2024 584th jatloe 883 70 22ms 26 Aug 2024 584th lgrandco 883 70 18ms 9 Oct 2024 584th snydej 883 70 21ms 21 Nov 2024 584th erikji 883 70 20ms 4 Feb 2025 584th CutSandstone 883 70 19ms 4 Feb 2025 584th albanian-laundromat 883 70 19ms 12 Apr 2025 584th xsot 🇸🇬 883 70 21ms 3 May 2025 584th fuzzylojik-golf 🇺🇸 883 70 18ms 14 Jun 2025 584th smilesformiles3 883 70 19ms 14 Jun 2025 584th KasperKivimaeki 🇫🇮 883 70 20ms 30 Jun 2025 584th adaGrad1 883 70 21ms 10 Aug 2025 584th EthanJantz 883 70 18ms 10 Aug 2025 584th qpwoeirut 883 70 17ms 10 Aug 2025 584th katss2 883 70 19ms 17 Aug 2025 584th intgrah 883 70 18ms 23 Sep 2025 584th ryyyn 🇺🇸 883 70 20ms 17 days ago 584th luuumine 🇫🇷 883 70 19ms 12 days ago 584th Babafaba 883 70 18ms 8 days ago 658th Irratix 🇳🇱 883 96 53ms 4 May 2022 658th MeWhenI 🇻🇦 883 96 56ms 1 Jun 2022 658th janbehrens 🇩🇪 883 96 54ms 21 Apr 2023 658th Shanethegamer 🇺🇸 883 96 56ms 15 May 2023 658th Yewzir 🇧🇪 883 96 57ms 11 Nov 2023 658th MateuszPietrzak 🇵🇱 883 96 56ms 18 Nov 2023 658th kkoenig 883 96 55ms 21 Dec 2023 658th BlankSpruce 883 96 56ms 20 Aug 2024 658th fuzzylojik-golf 🇺🇸 883 96 63ms 14 Jun 2025 667th Shanethegamer 🇺🇸 882 51 405ms 15 May 2023 668th GrayJoKing 🇦🇺 882 60 142ms 24 Oct 2024 669th Shanethegamer 🇺🇸 881 73 90ms 8 May 2025 669th DialFrost 🇸🇬 881 73 100ms 3 Jun 2025 669th edsrzf 🇳🇿 881 73 101ms 4 Jul 2025 672nd GrayJoKing 🇦🇺 881 84 53ms 19 Jun 2022 672nd primo-ppcg 🇹🇭 881 84 48ms 29 Jun 2022 674th Shanethegamer 🇺🇸 881 142 1,171ms 27 Mar 2025 674th DialFrost 🇸🇬 881 142 1,122ms 28 Mar 2025 First Prev 601–675 of 3,464 Next Last