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 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 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 Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers 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 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 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 Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 598th lifthrasiir 🇰🇷 901 74 19ms 13 Nov 2024 598th agreegious 901 74 18ms 17 Nov 2024 598th Stockoh 🇫🇷 901 74 25ms 17 Nov 2024 598th Andrey135296 901 74 20ms 24 Nov 2024 598th TralfamadorianComedian 901 74 19ms 6 Dec 2024 598th bltnppcnt 901 74 35ms 3 Jan 2025 598th ZorblaxV 901 74 27ms 12 Jan 2025 598th yokasuretsu 901 74 21ms 13 Jan 2025 598th Artemis21 🇬🇧 901 74 18ms 17 Jan 2025 598th gdpr777 901 74 35ms 10 Feb 2025 598th Pyroan 901 74 22ms 27 Mar 2025 598th Squimbletin 901 74 20ms 19 Apr 2025 598th Kowalskiexe 🇵🇱 901 74 21ms 19 Apr 2025 598th Dandandooo 901 74 22ms 23 Apr 2025 598th khangtm123 901 74 20ms 4 May 2025 598th 40fied4t 901 74 24ms 6 May 2025 598th keelimeguy 🇺🇸 901 74 20ms 13 May 2025 598th TheZwierzLF 🇵🇱 901 74 20ms 21 May 2025 598th kbeat 🇰🇿 901 74 23ms 21 May 2025 598th LvLError 901 74 19ms 29 May 2025 598th Lv0Sys 🇵🇱 901 74 18ms 30 May 2025 598th ffelixm 901 74 25ms 3 Jun 2025 598th Flekay 🇩🇪 901 74 27ms 19 Jun 2025 598th DoubleUynn 901 74 20ms 25 Jun 2025 598th osNiko 🇧🇷 901 74 20ms 26 Jul 2025 598th wobblybits 901 74 20ms 13 Aug 2025 598th denisfouchard 901 74 22ms 23 Aug 2025 598th Emutis 🇱🇹 901 74 31ms 23 Aug 2025 598th edsrzf 🇳🇿 901 74 20ms 10 Sep 2025 598th Matter1024 🇮🇳 901 74 20ms 11 Sep 2025 598th pauljoohyunkim 901 74 20ms 27 days ago 598th joll05 🇸🇪 901 74 25ms 21 days ago 598th retrohun 901 74 27ms 19 days ago 598th solisolu 901 74 21ms 18 days ago 598th Code-Coder-coder 901 74 19ms 10 days ago 711th Lydxn 🇨🇦 900 108 295ms 6 May 2022 711th CaedenHarper 🇨🇦 900 108 281ms 17 days ago 713th SirBogman 🇺🇸 899 50 414ms 5 May 2022 713th nwellnhof 🇩🇪 899 50 429ms 3 Jun 2022 713th Lydxn 🇨🇦 899 50 415ms 15 Aug 2022 713th Steffan153 🇫🇮 899 50 448ms 9 Aug 2024 717th DialFrost 🇸🇬 899 69 113ms 15 Jul 2024 718th Lydxn 🇨🇦 898 48 285ms 5 May 2022 718th p-zubieta 898 48 267ms 6 Mar 2024 720th GrayJoKing 🇦🇺 898 70 2ms 6 May 2022 720th saito-ta 🇯🇵 898 70 3ms 21 Dec 2023 720th ovs-code 🇩🇪 898 70 2ms 17 Feb 2024 720th trinityy-7 898 70 2ms 7 Aug 2025 720th KasperKivimaeki 🇫🇮 898 70 6ms 8 Aug 2025 725th Lydxn 🇨🇦 898 72 302ms 16 Jul 2023 726th GrayJoKing 🇦🇺 898 91 31ms 19 Jan 2023 727th DialFrost 🇸🇬 897 29 162ms 15 Mar 2025 728th Steffan153 🇫🇮 897 59 167ms 10 Aug 2024 728th rucin93 🇵🇱 897 59 160ms 13 Oct 2024 728th sean-niemann 🇺🇸 897 59 154ms 13 Oct 2024 728th lukegustafson 🇺🇸 897 59 132ms 24 Oct 2024 732nd edsrzf 🇳🇿 897 78 12ms 26 Oct 2024 732nd kg583 🇺🇸 897 78 14ms 27 days ago 734th Ripick 896 73 143ms 8 May 2023 735th MichalMarsalek 🇨🇿 895 87 334ms 5 May 2022 735th Kloppermand 🇩🇰 895 87 343ms 7 Oct 2022 735th bwat2 895 87 321ms 6 Apr 2023 738th ovs-code 🇩🇪 895 89 457ms 24 Jul 2024 738th jipsong 🇩🇪 895 89 467ms 7 Apr 2025 740th oeb25 894 93 158ms 16 May 2022 740th snobee 🇨🇦 894 93 139ms 8 Dec 2022 740th logvp 894 93 135ms 2 Jan 2024 740th elgan65536 894 93 154ms 5 Mar 2024 740th smartiel 894 93 131ms 12 Aug 2024 740th trist224 🇫🇷 894 93 148ms 12 Aug 2024 740th nullie 894 93 153ms 19 Dec 2024 740th lolgeny 894 93 140ms 22 Feb 2025 748th Shanethegamer 🇺🇸 893 61 6ms 31 Oct 2022 748th MeWhenI 🇻🇦 893 61 5ms 4 Nov 2022 750th JayXon 🇺🇸 893 74 2,938ms 14 Nov 2024 First Prev 676–750 of 3,408 Next Last
