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 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 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 Hilbert Curve Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle 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 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 Groovy Harbour Hare Haxe Hush Hy iogii Knight 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 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 Groovy Harbour Hare Haxe Hush Hy iogii Knight 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 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 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 Hilbert Curve Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Bytes Time 525th MeWhenI 🇻🇦 908 64 24 Dec 2024 527th GrayJoKing 🇦🇺 908 71 10 Aug 2023 528th Betuaredead 907 60 5 Jan 2023 528th Yewzir 🇧🇪 907 60 12 Feb 2023 528th Steffan153 🇫🇮 907 60 23 Feb 2023 528th DialFrost 🇸🇬 907 60 30 Jul 2024 528th GolfingSuccess 🇬🇷 907 60 16 Oct 2024 528th sean-niemann 🇺🇸 907 60 7 Mar 2025 534th edsrzf 🇳🇿 907 72 3 Jul 2025 535th Shanethegamer 🇺🇸 907 77 15 May 2023 536th marshallward 🇺🇸 907 83 10 May 2022 537th KrausRaus 🇺🇸 906 59 4 May 2022 537th voytxt 🇨🇿 906 59 4 May 2022 537th KingSkyrock 🇺🇸 906 59 18 May 2022 537th ZakkkkAttackkkk 🇵🇭 906 59 14 Jul 2022 537th aksyristos 906 59 28 Oct 2022 537th nstearns96 🇬🇧 906 59 28 Nov 2022 537th janbehrens 🇩🇪 906 59 17 May 2023 537th Shanethegamer 🇺🇸 906 59 25 May 2023 537th Maznek 906 59 26 Jun 2023 537th SpiritAxolotl 🇺🇸 906 59 20 Mar 2024 537th Andrey-Plotnikov 906 59 19 May 2024 537th emgordon154 906 59 5 Aug 2024 537th duckyluuk 🇳🇱 906 59 3 Oct 2024 537th lifthrasiir 🇰🇷 906 59 23 Nov 2024 537th fuzzylojik-golf 🇺🇸 906 59 1 Jun 2025 537th acollett89 906 59 17 Jun 2025 553rd ovs-code 🇩🇪 906 84 25 Sep 2022 553rd GrayJoKing 🇦🇺 906 84 11 Aug 2023 555th MeWhenI 🇻🇦 906 110 9 Feb 2023 555th edsrzf 🇳🇿 906 110 28 Nov 2024 555th targrik 906 110 30 Jun 2025 558th MeWhenI 🇻🇦 905 63 5 May 2022 559th krcs 🇵🇱 905 86 10 May 2022 559th billings7 🇬🇧 905 86 15 May 2022 559th revlayle 🇺🇸 905 86 7 Dec 2022 559th Widgitty 905 86 1 Sep 2023 563rd m-tkach 🇺🇦 905 90 7 Dec 2023 564th nipzu 904 48 8 Sep 2024 565th shinh 904 52 29 Jun 2022 565th pardouin 🇫🇷 904 52 12 Apr 2025 567th Lydxn 🇨🇦 904 64 1 Apr 2023 568th DialFrost 🇸🇬 904 76 7 days ago 569th Steffan153 🇫🇮 904 80 15 Nov 2022 569th error256 904 80 8 Apr 2025 571st Lydxn 🇨🇦 903 70 7 May 2022 572nd MeWhenI 🇻🇦 903 71 20 Aug 2024 573rd Shanethegamer 🇺🇸 903 72 4 May 2022 573rd jared-hughes 903 72 4 May 2022 573rd Waffle3z 903 72 5 May 2022 573rd m-tkach 🇺🇦 903 72 16 Oct 2022 573rd GrayJoKing 🇦🇺 903 72 22 Oct 2022 573rd emplv 🇱🇻 903 72 27 Oct 2022 573rd sean-niemann 🇺🇸 903 72 7 Mar 2025 573rd Blendi-Goose 903 72 16 Mar 2025 573rd edsrzf 🇳🇿 903 72 12 Apr 2025 582nd Shanethegamer 🇺🇸 903 82 19 Dec 2023 582nd edsrzf 🇳🇿 903 82 6 Jan 2025 584th stefangimmillaro 902 92 24 Oct 2023 584th inverseLorentz 🇦🇺 902 92 27 May 2024 584th sean-niemann 🇺🇸 902 92 8 Jun 2025 587th bwat2 902 130 5 May 2022 587th FlorianCassayre 🇫🇷 902 130 20 Sep 2022 587th Widgitty 902 130 29 May 2023 590th Steffan153 🇫🇮 901 82 1 Apr 2023 590th sean-niemann 🇺🇸 901 82 12 Jul 2024 592nd michael-pruglo 🇺🇦 901 94 5 Jul 2022 592nd zygoloid 901 94 5 Aug 2024 594th Lydxn 🇨🇦 900 69 12 Sep 2022 594th GrayJoKing 🇦🇺 900 69 12 Sep 2022 594th btnlq 900 69 24 Sep 2022 597th TobyBoyne 🇬🇧 900 74 4 May 2022 597th RDShah 900 74 6 May 2022 597th Indivicivet 900 74 9 May 2022 597th CedricGebistorf 900 74 9 May 2022 Prev 526–600 of 3,236 Next