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 286th betaveros 925 70 21ms 9 Aug 2022 286th shelerr 925 70 21ms 9 Sep 2022 286th stewSquared 🇺🇸 925 70 21ms 27 Sep 2022 286th orthoplex 🇨🇽 925 70 23ms 9 Oct 2022 286th 5quiwyrm 925 70 19ms 19 Oct 2022 286th myfatemi04 925 70 20ms 4 Nov 2022 286th kevinmchung 925 70 20ms 4 Nov 2022 286th FlorianCassayre 🇫🇷 925 70 25ms 7 Nov 2022 286th fourth-bit 925 70 18ms 29 Nov 2022 286th QuincyNash 🇺🇸 925 70 18ms 29 Nov 2022 286th aksyristos 925 70 20ms 25 Dec 2022 286th thizanne 925 70 19ms 27 Dec 2022 286th Alex-x90 🇺🇸 925 70 20ms 20 Jan 2023 286th bob-th 925 70 20ms 24 Jan 2023 286th SirFireball3521 925 70 17ms 25 Jan 2023 286th stefangimmillaro 925 70 23ms 6 Feb 2023 286th Seek64 🇩🇪 925 70 18ms 7 Feb 2023 286th FieryIceStickie 925 70 28ms 3 Apr 2023 286th MeWhenI 🇻🇦 925 70 23ms 30 Apr 2023 286th fgrosshans 🇫🇷 925 70 21ms 5 May 2023 286th Shanethegamer 🇺🇸 925 70 22ms 25 May 2023 286th InigoK 🇺🇸 925 70 20ms 14 Jun 2023 286th quimey 925 70 16ms 15 Jun 2023 286th CornerMercury 🇬🇧 925 70 20ms 19 Jun 2023 286th ndren 925 70 20ms 2 Aug 2023 286th bizy-coder 925 70 20ms 14 Aug 2023 286th janbehrens 🇩🇪 925 70 33ms 24 Nov 2023 286th namelessiw 925 70 20ms 9 Jan 2024 286th mathisfun271 925 70 25ms 13 Feb 2024 286th Just4FunCoder 925 70 23ms 17 Feb 2024 286th ThijsLuttikhuis 925 70 19ms 3 Mar 2024 286th elgan65536 925 70 20ms 5 Mar 2024 286th jtaxen 925 70 19ms 1 Apr 2024 286th HumanoidCPU 925 70 21ms 6 May 2024 286th abc7-12 925 70 29ms 6 May 2024 286th ahmetdemirag 🇨🇾 925 70 21ms 9 Jun 2024 286th FranklinJiaChen 925 70 20ms 4 Jul 2024 286th 5cw 🇺🇸 925 70 23ms 13 Jul 2024 286th CaedenHarper 🇨🇦 925 70 20ms 3 Aug 2024 286th emgordon154 925 70 29ms 5 Aug 2024 286th dokutan 925 70 24ms 9 Aug 2024 286th jatloe 925 70 21ms 26 Aug 2024 286th lgrandco 925 70 20ms 9 Oct 2024 286th snydej 925 70 26ms 21 Nov 2024 286th erikji 925 70 25ms 4 Feb 2025 286th CutSandstone 925 70 23ms 4 Feb 2025 286th albanian-laundromat 925 70 29ms 12 Apr 2025 286th xsot 🇸🇬 925 70 22ms 3 May 2025 286th fuzzylojik-golf 🇺🇸 925 70 20ms 14 Jun 2025 286th smilesformiles3 925 70 21ms 14 Jun 2025 286th KasperKivimaeki 🇫🇮 925 70 19ms 30 Jun 2025 286th adaGrad1 925 70 20ms 10 Aug 2025 286th EthanJantz 925 70 19ms 10 Aug 2025 286th qpwoeirut 925 70 18ms 10 Aug 2025 286th katss2 925 70 24ms 17 Aug 2025 286th intgrah 925 70 23ms 23 Sep 2025 286th ryyyn 🇺🇸 925 70 19ms 14 days ago 286th luuumine 🇫🇷 925 70 18ms 10 days ago 286th Babafaba 925 70 18ms 6 days ago 360th Lydxn 🇨🇦 924 90 126ms 6 May 2022 361st Bubbler-4 923 33 2,581ms 6 May 2022 361st rak1507 🇬🇧 923 33 113ms 8 May 2022 361st ngn 🇧🇬 923 33 26ms 11 May 2022 361st zacjl 923 33 32ms 3 Jun 2025 361st GrayJoKing 🇦🇺 923 33 14ms 4 Jun 2025 366th edsrzf 🇳🇿 923 54 796ms 13 Sep 2025 366th CaedenHarper 🇨🇦 923 54 817ms 27 Sep 2025 366th sean-niemann 🇺🇸 923 54 818ms 27 Sep 2025 369th btnlq 923 59 8ms 6 Nov 2022 370th nwellnhof 🇩🇪 922 51 50ms 4 May 2022 370th primo-ppcg 🇹🇭 922 51 43ms 6 May 2022 370th janlelis 922 51 39ms 10 May 2022 370th Natanaelel 🇸🇪 922 51 39ms 2 Jun 2022 374th uiamn 922 58 11ms 6 Sep 2022 374th 5quiwyrm 922 58 11ms 29 Sep 2022 First Prev 301–375 of 3,459 Next Last