Collatz in all languages in chars. 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 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 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 Mandelbrot 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 Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 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 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 Mandelbrot 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 Chars Time 826th Codsilla 🇨🇦 837 51 1 Jul 2022 827th frankgraziano 836 66 20 Apr 2025 828th SirBogman 🇺🇸 836 89 4 May 2022 829th CatsAreFluffy 836 101 18 Feb 2023 829th annaproxy 836 101 9 May 2023 829th wojtekmal 836 101 15 Nov 2023 829th HumanoidCPU 836 101 6 May 2024 829th eMGeeneer 836 101 27 Jun 2024 829th bac0id 836 101 29 Jun 2024 835th eshilo-draper 835 75 6 Sep 2022 836th sean-niemann 🇺🇸 835 76 8 Oct 2024 837th Andriamanitra 🇫🇮 835 83 17 Apr 2023 837th Natanaelel 🇸🇪 835 83 8 Jul 2023 839th Smetalo 835 93 25 Aug 2022 839th malworthy 835 93 19 Aug 2024 841st SirBogman 🇺🇸 834 36 5 May 2022 841st HPWiz 🇳🇿 834 36 7 May 2022 841st Natanaelel 🇸🇪 834 36 15 Jun 2022 841st Steffan153 🇫🇮 834 36 18 Jan 2023 841st codereport 🇨🇦 834 36 1 Jun 2024 841st GolfinK 834 36 21 Nov 2024 841st lifthrasiir 🇰🇷 834 36 1 Dec 2024 841st GolfingSuccess 🇬🇷 834 36 20 Mar 2025 849th scpchicken 🇵🇼 834 55 4 May 2022 849th SirBogman 🇺🇸 834 55 5 May 2022 849th Shanethegamer 🇺🇸 834 55 19 May 2023 849th DialFrost 🇸🇬 834 55 14 Feb 2025 853rd inverseLorentz 🇦🇺 834 69 3 Jun 2024 853rd CLOStrophobic 🇮🇹 834 69 17 days ago 855th primo-ppcg 🇹🇭 834 216 23 Apr 2025 856th ChiefChippy2 833 56 4 May 2022 856th aksyristos 833 56 29 Jan 2023 856th anter69 🇭🇺 833 56 12 Feb 2024 856th 3dm4n 🇫🇮 833 56 11 Mar 2024 856th lgrandco 833 56 9 Oct 2024 856th tatzyr 🇯🇵 833 56 10 Dec 2024 862nd moustave 833 67 7 Nov 2024 863rd Alex-x90 🇺🇸 833 74 4 Dec 2022 863rd undersquire 833 74 24 Jun 2023 863rd rdmsr 833 74 24 Jun 2023 863rd Bmrl7 833 74 9 Jul 2023 863rd Vinterion 833 74 6 Nov 2023 863rd namelessiw 833 74 28 Dec 2023 863rd Jonatan6 🇩🇰 833 74 15 Mar 2024 863rd Mandrzejy 🇵🇱 833 74 12 Apr 2024 863rd kaurakeksi 🇫🇮 833 74 29 Dec 2024 872nd CLOStrophobic 🇮🇹 833 89 14 Feb 2025 873rd Steffan153 🇫🇮 833 97 18 Jan 2023 874th RyanMHsiao 833 159 24 Sep 2024 875th Steffan153 🇫🇮 832 55 21 Dec 2022 876th Shanethegamer 🇺🇸 832 57 15 Dec 2022 876th anter69 🇭🇺 832 57 23 Feb 2023 876th stefangimmillaro 832 57 6 May 2023 879th elisherer 🇮🇱 832 64 5 Jun 2022 879th Ashikpaul 🇮🇳 832 64 29 Jul 2022 879th LukeBridges 🇬🇧 832 64 26 Oct 2022 879th florton 832 64 18 Jan 2023 879th DayDun 🇸🇪 832 64 24 Jan 2023 879th lyphyser 832 64 3 Jun 2023 879th Davr1 🇨🇿 832 64 14 Oct 2023 879th stellartux 832 64 26 Dec 2023 879th goodwyna21 832 64 12 Nov 2024 879th xShadowBlade 832 64 26 Dec 2024 889th dokutan 832 88 9 Jun 2024 890th MeWhenI 🇻🇦 832 101 5 May 2022 891st Yewzir 🇧🇪 831 69 24 Dec 2024 892nd nwellnhof 🇩🇪 831 117 16 Nov 2022 893rd ovs-code 🇩🇪 830 60 3 Aug 2024 893rd GrayJoKing 🇦🇺 830 60 24 Oct 2024 893rd Shanethegamer 🇺🇸 830 60 19 Dec 2024 896th alphafalfa 830 65 23 Aug 2024 897th emplv 🇱🇻 830 124 31 Oct 2022 898th Natanaelel 🇸🇪 829 39 10 Feb 2025 899th sean-niemann 🇺🇸 829 67 5 May 2022 899th pschmid0 🇺🇸 829 67 5 Aug 2022 Prev 826–900 of 3,071 Next