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 674th emgordon154 881 142 1,348ms 10 Apr 2025 677th primo-ppcg 🇹🇭 881 193 105ms 14 Aug 2025 678th johnnythedoggie 880 72 88ms 13 May 2022 678th kaascevich 880 72 81ms 8 Jul 2025 680th Grrisly 880 74 4ms 25 Mar 2024 681st dokutan 879 62 5ms 28 Apr 2025 682nd Shanethegamer 🇺🇸 878 66 189ms 4 May 2022 682nd scpchicken 🇵🇼 878 66 328ms 5 May 2022 682nd sisyphus-ppcg 🇦🇺 878 66 170ms 6 May 2022 682nd Natanaelel 🇸🇪 878 66 159ms 15 Jun 2022 682nd Z-snails 878 66 339ms 27 Feb 2023 682nd Jeremy-Stafford 878 66 333ms 27 Feb 2023 682nd alomiF 878 66 367ms 1 Sep 2023 682nd btnlq 878 66 144ms 17 Oct 2023 690th DialFrost 🇸🇬 878 86 49ms 24 Oct 2024 690th stefangimmillaro 878 86 49ms 14 Jan 2025 692nd JayXon 🇺🇸 878 158 1,590ms 14 Sep 2025 693rd c0d3-4-F00d 🇩🇪 877 61 9ms 6 May 2022 693rd jackkav 877 61 10ms 26 Jun 2022 693rd TechNolaByte 877 61 10ms 6 Jul 2022 693rd Heathcorp 🇦🇺 877 61 10ms 17 Jul 2022 693rd C0de5mith 🇺🇸 877 61 10ms 3 Aug 2022 693rd sebipopa 🇷🇴 877 61 11ms 18 Aug 2022 693rd moikaturns 🇬🇧 877 61 11ms 25 Sep 2022 693rd FlorianCassayre 🇫🇷 877 61 11ms 27 Sep 2022 693rd Mazn3k 877 61 10ms 1 Feb 2023 693rd tvcv901 877 61 10ms 22 Mar 2023 693rd unfinishedprogram 877 61 10ms 19 Jul 2023 693rd snoozingnewt 🇺🇸 877 61 11ms 23 Sep 2023 693rd funnyboy-roks 877 61 9ms 9 May 2024 693rd bac0id 877 61 11ms 29 Jun 2024 693rd madex 🇩🇪 877 61 11ms 9 Jul 2024 693rd FortuiteMan 🇫🇷 877 61 10ms 10 Oct 2024 693rd RobertHoeh 877 61 10ms 5 Apr 2025 693rd LvLError 877 61 10ms 29 May 2025 693rd Lv0Sys 🇵🇱 877 61 10ms 30 May 2025 693rd miles-evan 877 61 10ms 5 Aug 2025 693rd alexsave 877 61 14ms 13 Oct 2025 714th snoozingnewt 🇺🇸 877 95 341ms 8 Oct 2025 715th GolfingSuccess 🇬🇷 876 57 787ms 29 Aug 2025 716th nwellnhof 🇩🇪 876 111 262ms 4 May 2022 716th emplv 🇱🇻 876 111 261ms 5 May 2022 716th Shanethegamer 🇺🇸 876 111 277ms 21 Nov 2023 719th nwellnhof 🇩🇪 875 53 7ms 4 May 2022 719th GrayJoKing 🇦🇺 875 53 7ms 6 May 2022 721st AlephSquirrel 875 80 15ms 20 Apr 2023 721st ashtraypettingzoo 🇺🇸 875 80 13ms 1 Apr 2024 723rd c0d3-4-F00d 🇩🇪 875 89 344ms 5 May 2022 723rd fkantelberg 875 89 401ms 15 Jul 2023 723rd TRexOnGit 875 89 360ms 16 Feb 2024 726th ovs-code 🇩🇪 874 85 17ms 11 Dec 2023 727th inventshah 874 97 53ms 6 May 2022 727th roupiq 🇵🇱 874 97 49ms 22 Nov 2023 729th MeWhenI 🇻🇦 873 71 96ms 13 Dec 2022 730th Irratix 🇳🇱 873 72 3ms 4 May 2022 730th m-tkach 🇺🇦 873 72 2ms 4 May 2022 730th jared-hughes 873 72 3ms 6 Jul 2022 730th michael-pruglo 🇺🇦 873 72 3ms 13 Jul 2022 730th Steffan153 🇫🇮 873 72 3ms 3 Jan 2023 730th MeWhenI 🇻🇦 873 72 2ms 7 May 2023 730th ListeriaM 873 72 2ms 22 Aug 2023 730th JohandeRuiter 🇳🇱 873 72 2ms 14 Sep 2024 730th larcherMTT 873 72 3ms 5 Oct 2024 730th snyderek 🇺🇸 873 72 3ms 19 Feb 2025 730th 5quiwyrm 873 72 3ms 29 Jun 2025 730th TeodorDyakov 🇧🇬 873 72 2ms 8 Jul 2025 730th xiaoyiming123 873 72 2ms 12 Jul 2025 743rd Steffan153 🇫🇮 873 83 725ms 9 Apr 2023 743rd ovs-code 🇩🇪 873 83 63ms 1 Jul 2024 745th DialFrost 🇸🇬 872 64 5ms 10 Jul 2024 746th dieggsy 872 97 41ms 8 Oct 2024 747th ulucs 871 35 9ms 8 May 2022 747th bstrat 871 35 9ms 6 Jun 2024 747th wh3n3v3r 🇨🇿 871 35 8ms 18 Nov 2024 750th scpchicken 🇵🇼 871 45 349ms 4 May 2022 First Prev 676–750 of 3,465 Next Last