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 526th RockOfStone 892 73 5ms 20 Oct 2025 527th sean-niemann 🇺🇸 892 109 261ms 25 May 2024 527th GolfingSuccess 🇬🇷 892 109 252ms 6 Sep 2025 529th lynn 891 65 316ms 5 May 2022 529th GrayJoKing 🇦🇺 891 65 327ms 5 May 2022 529th Sakisan 🇧🇪 891 65 214ms 6 May 2022 529th JayXon 🇺🇸 891 65 366ms 17 Oct 2022 529th Steffan153 🇫🇮 891 65 172ms 12 Nov 2022 529th tobeannouncd 891 65 331ms 25 Apr 2025 529th sean-niemann 🇺🇸 891 65 174ms 9 Jun 2025 536th GrayJoKing 🇦🇺 891 77 76ms 13 Sep 2024 537th DialFrost 🇸🇬 891 95 32ms 10 Dec 2024 538th canissimia 🇦🇶 891 110 3,068ms 20 Feb 2023 539th primo-ppcg 🇹🇭 890 52 213ms 5 May 2022 539th dvargas46 🇺🇸 890 52 83ms 22 Dec 2022 541st mousetail 🇳🇱 888 41 73ms 29 Aug 2025 542nd MeWhenI 🇻🇦 888 53 41ms 1 Jun 2022 542nd stefangimmillaro 888 53 38ms 2 Oct 2022 542nd Haksell 🇦🇶 888 53 40ms 22 Feb 2023 545th primo-ppcg 🇹🇭 888 85 43ms 14 Jan 2025 545th MeWhenI 🇻🇦 888 85 44ms 21 Apr 2025 547th jared-hughes 888 130 23ms 15 Dec 2024 548th canissimia 🇦🇶 888 204 16ms 25 Nov 2023 549th albanian-laundromat 887 94 339ms 24 Sep 2025 549th kmathis22 887 94 340ms 14 Oct 2025 549th jkelly467 887 94 339ms 25 days ago 549th HumanoidCPU 887 94 337ms 9 days ago 553rd Shanethegamer 🇺🇸 886 70 93ms 12 Dec 2022 553rd Alessandro-Balconi 🇮🇹 886 70 88ms 26 Dec 2022 555th ovs-code 🇩🇪 886 73 300ms 22 Jul 2023 556th janbehrens 🇩🇪 886 90 442ms 21 Apr 2023 556th Yewzir 🇧🇪 886 90 463ms 22 Apr 2023 556th DialFrost 🇸🇬 886 90 440ms 6 Nov 2023 556th Ripick 886 90 439ms 27 Nov 2024 560th m-tkach 🇺🇦 886 112 69ms 22 Jun 2025 561st GolfingSuccess 🇬🇷 885 71 2ms 5 May 2022 561st emplv 🇱🇻 885 71 3ms 5 May 2022 561st JayXon 🇺🇸 885 71 2ms 7 May 2022 561st nwellnhof 🇩🇪 885 71 2ms 5 Jun 2022 561st stefangimmillaro 885 71 2ms 2 Jun 2023 561st 09cf 885 71 2ms 4 Oct 2023 561st kkoenig 885 71 3ms 21 Dec 2023 561st sean-niemann 🇺🇸 885 71 3ms 10 Jul 2024 561st masinag 🇮🇹 885 71 2ms 6 Oct 2024 570th SiestaGuru 885 88 325ms 9 Jan 2023 570th rifatx 885 88 312ms 5 Jul 2024 570th kmathis22 885 88 349ms 25 Sep 2025 570th arcpolaris 885 88 297ms 9 days ago 574th m-tkach 🇺🇦 884 59 511ms 21 Jan 2024 574th GolfingSuccess 🇬🇷 884 59 561ms 20 Jan 2025 576th steffan-polygolf 884 74 130ms 14 Feb 2024 577th kg583 🇺🇸 884 84 17ms 30 Jul 2025 578th nipzu 884 94 129ms 17 May 2022 578th Natanaelel 🇸🇪 884 94 130ms 17 Jun 2022 578th nkoppel 884 94 123ms 19 Oct 2022 578th ovs-code 🇩🇪 884 94 125ms 21 Jun 2023 578th mousetail 🇳🇱 884 94 127ms 12 Jan 2024 583rd MeWhenI 🇻🇦 884 110 255ms 9 Feb 2023 583rd edsrzf 🇳🇿 884 110 247ms 28 Nov 2024 583rd targrik 884 110 248ms 30 Jun 2025 586th MichalMarsalek 🇨🇿 883 70 19ms 5 May 2022 586th primo-ppcg 🇹🇭 883 70 23ms 5 May 2022 586th SirBogman 🇺🇸 883 70 29ms 5 May 2022 586th prplz 🇦🇺 883 70 18ms 5 May 2022 586th Irratix 🇳🇱 883 70 16ms 7 May 2022 586th rak1507 🇬🇧 883 70 20ms 7 May 2022 586th inventshah 883 70 16ms 9 May 2022 586th k3w1k0d3r 883 70 19ms 22 Jun 2022 586th ZakkkkAttackkkk 🇵🇭 883 70 16ms 14 Jul 2022 586th Bonjour27891 🇻🇳 883 70 19ms 14 Jul 2022 586th OllieBoyne 🇬🇧 883 70 19ms 19 Jul 2022 586th bricknellj 883 70 17ms 25 Jul 2022 586th wen1now 883 70 21ms 8 Aug 2022 586th 051 🇸🇬 883 70 23ms 8 Aug 2022 586th Sp3000 🇦🇺 883 70 25ms 8 Aug 2022 First Prev 526–600 of 3,471 Next Last