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 525th AlephSquirrel 909 93 21 Jan 2023 525th kg583 🇺🇸 909 93 26 Dec 2024 525th CLOStrophobic 🇮🇹 909 93 17 Jan 2025 525th edsrzf 🇳🇿 909 93 3 Jul 2025 530th edsrzf 🇳🇿 908 72 3 Jul 2025 531st DialFrost 🇸🇬 908 76 3 Aug 2025 532nd ovs-code 🇩🇪 908 84 25 Sep 2022 532nd GrayJoKing 🇦🇺 908 84 11 Aug 2023 534th m-tkach 🇺🇦 908 90 7 Dec 2023 535th KrausRaus 🇺🇸 907 59 4 May 2022 535th voytxt 🇨🇿 907 59 4 May 2022 535th KingSkyrock 🇺🇸 907 59 18 May 2022 535th ZakkkkAttackkkk 🇵🇭 907 59 14 Jul 2022 535th aksyristos 907 59 28 Oct 2022 535th nstearns96 🇬🇧 907 59 28 Nov 2022 535th janbehrens 🇩🇪 907 59 17 May 2023 535th Shanethegamer 🇺🇸 907 59 25 May 2023 535th Maznek 907 59 26 Jun 2023 535th SpiritAxolotl 🇺🇸 907 59 20 Mar 2024 535th Andrey-Plotnikov 907 59 19 May 2024 535th emgordon154 907 59 5 Aug 2024 535th duckyluuk 🇳🇱 907 59 3 Oct 2024 535th lifthrasiir 🇰🇷 907 59 23 Nov 2024 535th fuzzylojik-golf 🇺🇸 907 59 1 Jun 2025 535th acollett89 907 59 17 Jun 2025 535th iczelia 🇩🇪 907 59 24 days ago 552nd Betuaredead 907 60 5 Jan 2023 552nd Yewzir 🇧🇪 907 60 12 Feb 2023 552nd Steffan153 🇫🇮 907 60 23 Feb 2023 552nd DialFrost 🇸🇬 907 60 30 Jul 2024 552nd GolfingSuccess 🇬🇷 907 60 16 Oct 2024 552nd sean-niemann 🇺🇸 907 60 7 Mar 2025 558th nipzu 906 48 8 Sep 2024 559th albanian-laundromat 906 55 25 days ago 560th Steffan153 🇫🇮 906 80 15 Nov 2022 560th error256 906 80 8 Apr 2025 562nd shinh 905 52 29 Jun 2022 563rd Lydxn 🇨🇦 905 64 1 Apr 2023 564th Lydxn 🇨🇦 905 70 7 May 2022 565th MeWhenI 🇻🇦 905 71 20 Aug 2024 566th Shanethegamer 🇺🇸 905 82 19 Dec 2023 566th edsrzf 🇳🇿 905 82 6 Jan 2025 568th krcs 🇵🇱 905 86 10 May 2022 568th billings7 🇬🇧 905 86 15 May 2022 568th revlayle 🇺🇸 905 86 7 Dec 2022 568th Widgitty 905 86 1 Sep 2023 568th albanian-laundromat 905 86 17 days ago 573rd Shanethegamer 🇺🇸 904 72 4 May 2022 573rd jared-hughes 904 72 4 May 2022 573rd Waffle3z 904 72 5 May 2022 573rd m-tkach 🇺🇦 904 72 16 Oct 2022 573rd GrayJoKing 🇦🇺 904 72 22 Oct 2022 573rd emplv 🇱🇻 904 72 27 Oct 2022 573rd sean-niemann 🇺🇸 904 72 7 Mar 2025 573rd Blendi-Goose 904 72 16 Mar 2025 573rd edsrzf 🇳🇿 904 72 12 Apr 2025 573rd sean-niemann 🇺🇸 904 72 28 hours ago 583rd edsrzf 🇳🇿 904 83 14 Jan 2025 583rd kg583 🇺🇸 904 83 14 Feb 2025 585th Steffan153 🇫🇮 903 82 1 Apr 2023 585th sean-niemann 🇺🇸 903 82 12 Jul 2024 587th stefangimmillaro 903 92 24 Oct 2023 587th inverseLorentz 🇦🇺 903 92 27 May 2024 587th sean-niemann 🇺🇸 903 92 8 Jun 2025 590th Lydxn 🇨🇦 902 69 12 Sep 2022 590th GrayJoKing 🇦🇺 902 69 12 Sep 2022 590th btnlq 902 69 24 Sep 2022 593rd michael-pruglo 🇺🇦 902 94 5 Jul 2022 593rd zygoloid 902 94 5 Aug 2024 595th TobyBoyne 🇬🇧 901 74 4 May 2022 595th RDShah 901 74 6 May 2022 595th Indivicivet 901 74 9 May 2022 595th CedricGebistorf 901 74 9 May 2022 595th ophact 901 74 11 May 2022 595th ImpressedByRocks 901 74 17 May 2022 First Prev 526–600 of 3,398 Next Last