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 749th wh3n3v3r 🇨🇿 871 35 8ms 18 Nov 2024 752nd scpchicken 🇵🇼 871 45 349ms 4 May 2022 752nd SirBogman 🇺🇸 871 45 241ms 5 May 2022 754th Andriamanitra 🇫🇮 871 54 42ms 21 Jul 2022 754th jared-hughes 871 54 39ms 12 Sep 2022 754th OhmNomNom 871 54 47ms 7 Oct 2022 754th olleicua 🇺🇸 871 54 41ms 21 Jan 2024 754th LostSyntax21 🇬🇧 871 54 41ms 12 Mar 2025 754th AbrahamJLR 🇻🇪 871 54 40ms 4 Jun 2025 754th vishal-mohanty 871 54 42ms 25 Aug 2025 761st TFeld00 🇩🇰 871 71 25ms 17 May 2022 761st DialFrost 🇸🇬 871 71 36ms 15 Nov 2022 761st StefanHabel 🇨🇦 871 71 18ms 29 Nov 2022 761st nstearns96 🇬🇧 871 71 19ms 11 Jan 2023 761st hallvabo 🇳🇴 871 71 19ms 7 Feb 2023 761st anter69 🇭🇺 871 71 18ms 21 May 2024 761st rucin93 🇵🇱 871 71 17ms 10 Jul 2024 761st lelbal 871 71 18ms 26 Aug 2025 761st HETHAT 🇩🇿 871 71 24ms 23 Sep 2025 770th MeWhenI 🇻🇦 871 85 44ms 27 Jun 2022 770th Shanethegamer 🇺🇸 871 85 42ms 15 May 2023 770th albanian-laundromat 871 85 45ms 25 Aug 2025 773rd CaedenHarper 🇨🇦 869 60 710ms 28 Sep 2025 774th GrayJoKing 🇦🇺 869 67 80ms 8 Feb 2025 775th Steffan153 🇫🇮 869 82 1,270ms 23 Feb 2023 776th Frowny 868 38 43ms 5 May 2022 776th stackofbears 868 38 53ms 14 Mar 2025 778th steffan-polygolf 868 73 85ms 23 Feb 2023 778th MWI-polygolf 868 73 81ms 6 Dec 2023 778th HumanoidCPU 868 73 80ms 7 May 2024 781st mtirado1 868 75 8ms 13 Aug 2022 782nd stefangimmillaro 868 112 259ms 26 Sep 2023 782nd kkoenig 868 112 256ms 4 Jan 2024 784th ovs-code 🇩🇪 868 133 42ms 8 Jul 2024 785th pardouin 🇫🇷 867 61 135ms 7 Aug 2024 786th MeWhenI 🇻🇦 867 92 398ms 10 Oct 2022 786th Betuaredead 867 92 468ms 5 Jan 2023 786th emgordon154 867 92 427ms 27 May 2025 786th Yax42 🇫🇷 867 92 420ms 4 Oct 2025 790th TylerBloom 866 96 127ms 22 Mar 2024 791st 5quiwyrm 865 52 242ms 4 Sep 2022 791st MeWhenI 🇻🇦 865 52 265ms 28 Jan 2023 791st Feniske 🇫🇷 865 52 251ms 7 Nov 2023 791st dcgjb 865 52 300ms 29 Jan 2024 791st JPRuskin 🇬🇧 865 52 254ms 7 Apr 2025 791st IISResetMe 865 52 268ms 7 Apr 2025 791st Ripick 865 52 265ms 1 Jun 2025 798th MeWhenI 🇻🇦 865 81 7ms 23 May 2023 799th bac0id 865 90 363ms 26 Sep 2023 799th deadp4nda 🇩🇪 865 90 343ms 26 Apr 2024 799th 123mjb 865 90 346ms 23 Jun 2025 799th michelebastione 🇮🇹 865 90 314ms 24 Aug 2025 799th razvandmtr 🇷🇴 865 90 305ms 9 days ago 804th shellbertt 🇨🇦 865 98 55ms 9 May 2022 804th iakolzin 865 98 54ms 26 May 2022 804th Betuaredead 865 98 56ms 5 Jan 2023 804th oceko 865 98 55ms 19 Feb 2024 804th dokutan 865 98 54ms 17 Mar 2024 804th cuzdav 865 98 57ms 4 May 2025 804th timhaj 🇸🇮 865 98 55ms 12 Sep 2025 804th Yax42 🇫🇷 865 98 53ms 4 Oct 2025 812th Andriamanitra 🇫🇮 864 67 159ms 26 Apr 2023 813th DialFrost 🇸🇬 864 86 20ms 15 Dec 2024 814th Setvizan 863 62 10ms 12 Jan 2023 814th GreenBeansAgainstVeganism 863 62 11ms 13 Jan 2023 814th arctouch-cristiannevianna 863 62 13ms 3 Apr 2023 814th Corxldyphik 863 62 13ms 11 Apr 2023 814th Blockyheadman 863 62 10ms 1 Nov 2023 814th ollyspooner 863 62 10ms 22 Nov 2023 814th itserasmus 863 62 13ms 25 Jan 2024 814th Jacob385 863 62 10ms 13 Mar 2024 814th junkondo-jp 863 62 10ms 30 Jun 2024 814th ShiraJoseph 🇺🇸 863 62 11ms 1 Mar 2025 824th MeWhenI 🇻🇦 863 145 452ms 28 Mar 2025 825th HPWiz 🇳🇿 862 50 259ms 4 May 2022 First Prev 751–825 of 3,469 Next Last