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 287th Sp3000 🇦🇺 925 70 20ms 8 Aug 2022 287th betaveros 925 70 21ms 9 Aug 2022 287th shelerr 925 70 21ms 9 Sep 2022 287th stewSquared 🇺🇸 925 70 21ms 27 Sep 2022 287th orthoplex 🇨🇽 925 70 23ms 9 Oct 2022 287th 5quiwyrm 925 70 19ms 19 Oct 2022 287th myfatemi04 925 70 20ms 4 Nov 2022 287th kevinmchung 925 70 20ms 4 Nov 2022 287th FlorianCassayre 🇫🇷 925 70 25ms 7 Nov 2022 287th fourth-bit 925 70 18ms 29 Nov 2022 287th QuincyNash 🇺🇸 925 70 18ms 29 Nov 2022 287th aksyristos 925 70 20ms 25 Dec 2022 287th thizanne 925 70 19ms 27 Dec 2022 287th Alex-x90 🇺🇸 925 70 20ms 20 Jan 2023 287th bob-th 925 70 20ms 24 Jan 2023 287th SirFireball3521 925 70 17ms 25 Jan 2023 287th stefangimmillaro 925 70 23ms 6 Feb 2023 287th Seek64 🇩🇪 925 70 18ms 7 Feb 2023 287th FieryIceStickie 925 70 28ms 3 Apr 2023 287th MeWhenI 🇻🇦 925 70 23ms 30 Apr 2023 287th fgrosshans 🇫🇷 925 70 21ms 5 May 2023 287th Shanethegamer 🇺🇸 925 70 22ms 25 May 2023 287th InigoK 🇺🇸 925 70 20ms 14 Jun 2023 287th quimey 925 70 16ms 15 Jun 2023 287th CornerMercury 🇬🇧 925 70 20ms 19 Jun 2023 287th ndren 925 70 20ms 2 Aug 2023 287th bizy-coder 925 70 20ms 14 Aug 2023 287th janbehrens 🇩🇪 925 70 33ms 24 Nov 2023 287th namelessiw 925 70 20ms 9 Jan 2024 287th mathisfun271 925 70 25ms 13 Feb 2024 287th Just4FunCoder 925 70 23ms 17 Feb 2024 287th ThijsLuttikhuis 925 70 19ms 3 Mar 2024 287th elgan65536 925 70 20ms 5 Mar 2024 287th jtaxen 925 70 19ms 1 Apr 2024 287th HumanoidCPU 925 70 21ms 6 May 2024 287th abc7-12 925 70 29ms 6 May 2024 287th ahmetdemirag 🇨🇾 925 70 21ms 9 Jun 2024 287th FranklinJiaChen 925 70 20ms 4 Jul 2024 287th 5cw 🇺🇸 925 70 23ms 13 Jul 2024 287th CaedenHarper 🇨🇦 925 70 20ms 3 Aug 2024 287th emgordon154 925 70 29ms 5 Aug 2024 287th dokutan 925 70 24ms 9 Aug 2024 287th jatloe 925 70 21ms 26 Aug 2024 287th lgrandco 925 70 20ms 9 Oct 2024 287th snydej 925 70 26ms 21 Nov 2024 287th erikji 925 70 25ms 4 Feb 2025 287th CutSandstone 925 70 23ms 4 Feb 2025 287th albanian-laundromat 925 70 29ms 12 Apr 2025 287th xsot 🇸🇬 925 70 22ms 3 May 2025 287th fuzzylojik-golf 🇺🇸 925 70 20ms 14 Jun 2025 287th smilesformiles3 925 70 21ms 14 Jun 2025 287th KasperKivimaeki 🇫🇮 925 70 19ms 30 Jun 2025 287th adaGrad1 925 70 20ms 10 Aug 2025 287th EthanJantz 925 70 19ms 10 Aug 2025 287th qpwoeirut 925 70 18ms 10 Aug 2025 287th katss2 925 70 24ms 17 Aug 2025 287th intgrah 925 70 23ms 23 Sep 2025 287th ryyyn 🇺🇸 925 70 19ms 15 days ago 287th luuumine 🇫🇷 925 70 18ms 10 days ago 287th Babafaba 925 70 18ms 6 days ago 361st Lydxn 🇨🇦 924 90 126ms 6 May 2022 362nd Bubbler-4 923 33 2,581ms 6 May 2022 362nd rak1507 🇬🇧 923 33 113ms 8 May 2022 362nd ngn 🇧🇬 923 33 26ms 11 May 2022 362nd zacjl 923 33 32ms 3 Jun 2025 362nd GrayJoKing 🇦🇺 923 33 14ms 4 Jun 2025 367th edsrzf 🇳🇿 923 54 796ms 13 Sep 2025 367th CaedenHarper 🇨🇦 923 54 817ms 27 Sep 2025 367th sean-niemann 🇺🇸 923 54 818ms 27 Sep 2025 370th btnlq 923 59 8ms 6 Nov 2022 371st nwellnhof 🇩🇪 922 51 50ms 4 May 2022 371st primo-ppcg 🇹🇭 922 51 43ms 6 May 2022 371st janlelis 922 51 39ms 10 May 2022 371st Natanaelel 🇸🇪 922 51 39ms 2 Jun 2022 375th uiamn 922 58 11ms 6 Sep 2022 First Prev 301–375 of 3,461 Next Last