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 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 Maze Medal Tally 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 Transpose Sentence United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Hilbert Curve Mandelbrot Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle 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 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 Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 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 Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 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 Maze Medal Tally 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 Transpose Sentence United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Hilbert Curve Mandelbrot Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Bytes Time 109th namelessiw 951 70 9 Jan 2024 109th mathisfun271 951 70 13 Feb 2024 109th Just4FunCoder 951 70 17 Feb 2024 109th ThijsLuttikhuis 951 70 3 Mar 2024 109th elgan65536 951 70 5 Mar 2024 109th jtaxen 951 70 1 Apr 2024 109th HumanoidCPU 951 70 6 May 2024 109th abc7-12 951 70 6 May 2024 109th ahmetdemirag 🇨🇾 951 70 9 Jun 2024 109th FranklinJiaChen 951 70 4 Jul 2024 109th 5cw 🇺🇸 951 70 13 Jul 2024 109th CaedenHarper 🇨🇦 951 70 3 Aug 2024 109th emgordon154 951 70 5 Aug 2024 109th dokutan 951 70 9 Aug 2024 109th jatloe 951 70 26 Aug 2024 109th lgrandco 951 70 9 Oct 2024 109th snydej 951 70 21 Nov 2024 109th erikji 951 70 4 Feb 2025 109th CutSandstone 951 70 4 Feb 2025 109th Mukundan314 951 70 3 Apr 2025 109th albanian-laundromat 951 70 12 Apr 2025 109th xsot 🇸🇬 951 70 3 May 2025 109th moustave 951 70 2 days ago 174th Lydxn 🇨🇦 951 89 6 May 2022 174th JayXon 🇺🇸 951 89 7 May 2022 174th nwellnhof 🇩🇪 951 89 5 Jun 2022 174th snyderek 🇺🇸 951 89 19 Feb 2025 178th ovs-code 🇩🇪 949 61 5 Aug 2024 179th Lydxn 🇨🇦 948 59 6 May 2022 180th Lydxn 🇨🇦 947 55 16 Jan 2024 180th ovs-code 🇩🇪 947 55 16 Jan 2024 180th Steffan153 🇫🇮 947 55 16 Jan 2024 180th kg583 🇺🇸 947 55 16 Feb 2024 180th Shanethegamer 🇺🇸 947 55 24 Mar 2024 180th pardouin 🇫🇷 947 55 30 Jun 2024 180th JayXon 🇺🇸 947 55 17 Aug 2024 180th sean-niemann 🇺🇸 947 55 24 Jan 2025 188th primo-ppcg 🇹🇭 946 49 5 May 2022 188th Lydxn 🇨🇦 946 49 8 May 2022 190th saito-ta 🇯🇵 943 49 13 May 2022 190th Lydxn 🇨🇦 943 49 28 May 2022 192nd JayXon 🇺🇸 943 88 17 Oct 2022 193rd lyphyser 942 46 13 Jan 2024 193rd AdrienHache 🇫🇷 942 46 9 Apr 2024 195th JayXon 🇺🇸 942 69 17 Oct 2022 195th Lydxn 🇨🇦 942 69 4 Feb 2023 197th canissimia 🇦🇶 940 50 5 May 2022 197th ovs-code 🇩🇪 940 50 7 May 2022 197th sisyphus-ppcg 🇦🇺 940 50 20 Feb 2023 197th Steffan153 🇫🇮 940 50 20 Jul 2024 197th sean-niemann 🇺🇸 940 50 79 mins ago 202nd namelessiw 940 83 9 Apr 2025 202nd dokutan 940 83 9 Apr 2025 202nd m-tkach 🇺🇦 940 83 10 Apr 2025 202nd DialFrost 🇸🇬 940 83 10 Apr 2025 202nd Pecanolith 940 83 19 Apr 2025 202nd Tyrant7 940 83 19 Apr 2025 202nd Yax42 🇫🇷 940 83 19 Apr 2025 209th canissimia 🇦🇶 939 51 6 May 2022 209th Lydxn 🇨🇦 939 51 6 May 2022 209th primo-ppcg 🇹🇭 939 51 6 May 2022 209th pardouin 🇫🇷 939 51 12 Apr 2025 213th inventshah 938 57 4 May 2022 213th itsh01 938 57 17 May 2022 213th Natanaelel 🇸🇪 938 57 16 Jun 2022 213th Attero 🇸🇪 938 57 3 Aug 2022 213th SirFireball3521 938 57 26 Jan 2023 213th Kacarott 🇦🇺 938 57 24 Mar 2023 213th nathanadams 🇳🇿 938 57 24 Apr 2023 213th hacker112 🇸🇪 938 57 20 Jun 2024 213th thisishowmymindworks 🇳🇴 938 57 28 Jun 2024 213th Salutations45 938 57 18 Nov 2024 223rd primo-ppcg 🇹🇭 938 58 13 Nov 2022 223rd clockworknazo 938 58 15 Nov 2022 223rd Lydxn 🇨🇦 938 58 7 Feb 2023 Prev 151–225 of 3,081 Next