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 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 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 605th imelxr 🇮🇱 901 74 27ms 17 Aug 2024 605th EnTerr 901 74 28ms 25 Aug 2024 605th Mabeloid 🇳🇴 901 74 24ms 1 Sep 2024 605th madeforlosers 901 74 19ms 5 Sep 2024 605th LostSyntax21 🇬🇧 901 74 20ms 10 Sep 2024 605th Deedogg 901 74 20ms 11 Sep 2024 605th MassimoParisi 901 74 23ms 18 Sep 2024 605th lifthrasiir 🇰🇷 901 74 19ms 13 Nov 2024 605th agreegious 901 74 18ms 17 Nov 2024 605th Stockoh 🇫🇷 901 74 25ms 17 Nov 2024 605th Andrey135296 901 74 20ms 24 Nov 2024 605th TralfamadorianComedian 901 74 19ms 6 Dec 2024 605th bltnppcnt 901 74 35ms 3 Jan 2025 605th ZorblaxV 901 74 27ms 12 Jan 2025 605th yokasuretsu 901 74 21ms 13 Jan 2025 605th Artemis21 🇬🇧 901 74 18ms 17 Jan 2025 605th gdpr777 901 74 35ms 10 Feb 2025 605th Pyroan 901 74 22ms 27 Mar 2025 605th Squimbletin 901 74 20ms 19 Apr 2025 605th Kowalskiexe 🇵🇱 901 74 21ms 19 Apr 2025 605th Dandandooo 901 74 22ms 23 Apr 2025 605th khangtm123 901 74 20ms 4 May 2025 605th 40fied4t 901 74 24ms 6 May 2025 605th keelimeguy 🇺🇸 901 74 20ms 13 May 2025 605th TheZwierzLF 🇵🇱 901 74 20ms 21 May 2025 605th kbeat 🇰🇿 901 74 23ms 21 May 2025 605th LvLError 901 74 19ms 29 May 2025 605th Lv0Sys 🇵🇱 901 74 18ms 30 May 2025 605th ffelixm 901 74 25ms 3 Jun 2025 605th Flekay 🇩🇪 901 74 27ms 19 Jun 2025 605th DoubleUynn 901 74 20ms 25 Jun 2025 605th osNiko 🇧🇷 901 74 20ms 26 Jul 2025 605th wobblybits 901 74 20ms 13 Aug 2025 605th denisfouchard 901 74 22ms 23 Aug 2025 605th Emutis 🇱🇹 901 74 31ms 23 Aug 2025 605th edsrzf 🇳🇿 901 74 20ms 10 Sep 2025 605th Matter1024 🇮🇳 901 74 20ms 11 Sep 2025 605th pauljoohyunkim 901 74 20ms 25 Sep 2025 605th joll05 🇸🇪 901 74 25ms 1 Oct 2025 605th retrohun 901 74 27ms 3 Oct 2025 605th solisolu 901 74 21ms 4 Oct 2025 605th Code-Coder-coder 901 74 19ms 12 Oct 2025 605th fvla 901 74 23ms 11 days ago 719th Lydxn 🇨🇦 900 108 260ms 6 May 2022 719th CaedenHarper 🇨🇦 900 108 256ms 5 Oct 2025 721st SirBogman 🇺🇸 899 50 414ms 5 May 2022 721st nwellnhof 🇩🇪 899 50 429ms 3 Jun 2022 721st Lydxn 🇨🇦 899 50 415ms 15 Aug 2022 721st Steffan153 🇫🇮 899 50 448ms 9 Aug 2024 725th DialFrost 🇸🇬 899 69 94ms 15 Jul 2024 726th Lydxn 🇨🇦 898 48 285ms 5 May 2022 726th p-zubieta 898 48 249ms 6 Mar 2024 728th GrayJoKing 🇦🇺 898 70 2ms 6 May 2022 728th saito-ta 🇯🇵 898 70 3ms 21 Dec 2023 728th ovs-code 🇩🇪 898 70 2ms 17 Feb 2024 728th trinityy-7 898 70 2ms 7 Aug 2025 728th KasperKivimaeki 🇫🇮 898 70 6ms 8 Aug 2025 733rd Lydxn 🇨🇦 898 72 302ms 16 Jul 2023 734th GrayJoKing 🇦🇺 898 91 31ms 19 Jan 2023 735th DialFrost 🇸🇬 897 29 162ms 15 Mar 2025 736th Steffan153 🇫🇮 897 59 137ms 10 Aug 2024 736th rucin93 🇵🇱 897 59 136ms 13 Oct 2024 736th sean-niemann 🇺🇸 897 59 137ms 13 Oct 2024 736th lukegustafson 🇺🇸 897 59 135ms 24 Oct 2024 740th edsrzf 🇳🇿 897 78 12ms 26 Oct 2024 740th kg583 🇺🇸 897 78 11ms 25 Sep 2025 742nd Ripick 896 73 121ms 8 May 2023 743rd MichalMarsalek 🇨🇿 895 87 334ms 5 May 2022 743rd Kloppermand 🇩🇰 895 87 343ms 7 Oct 2022 743rd bwat2 895 87 321ms 6 Apr 2023 746th ovs-code 🇩🇪 895 89 457ms 24 Jul 2024 746th jipsong 🇩🇪 895 89 467ms 7 Apr 2025 748th oeb25 894 93 152ms 16 May 2022 748th snobee 🇨🇦 894 93 155ms 8 Dec 2022 748th logvp 894 93 130ms 2 Jan 2024 First Prev 676–750 of 3,438 Next Last
