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 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 QR Encoder Quadratic Formula Scrambled Alphabetization 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 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 QR Encoder Quadratic Formula Scrambled Alphabetization Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Chars Time 826th scpchicken 🇵🇼 834 55 4 May 2022 826th SirBogman 🇺🇸 834 55 5 May 2022 826th Shanethegamer 🇺🇸 834 55 19 May 2023 826th DialFrost 🇸🇬 834 55 14 Feb 2025 830th inverseLorentz 🇦🇺 834 69 3 Jun 2024 831st sean-niemann 🇺🇸 834 76 8 Oct 2024 832nd Smetalo 834 93 25 Aug 2022 832nd malworthy 834 93 19 Aug 2024 832nd 123mjb 834 93 17 Oct 2024 835th primo-ppcg 🇹🇭 834 216 23 Apr 2025 836th ChiefChippy2 833 56 4 May 2022 836th aksyristos 833 56 29 Jan 2023 836th anter69 🇭🇺 833 56 12 Feb 2024 836th 3dm4n 🇫🇮 833 56 11 Mar 2024 836th lgrandco 833 56 9 Oct 2024 836th AbrahamJLR 833 56 28 Nov 2024 836th tatzyr 🇯🇵 833 56 10 Dec 2024 843rd moustave 833 67 7 Nov 2024 844th Alex-x90 🇺🇸 833 74 4 Dec 2022 844th undersquire 833 74 24 Jun 2023 844th rdmsr 833 74 24 Jun 2023 844th Bmrl7 833 74 9 Jul 2023 844th Vinterion 833 74 6 Nov 2023 844th namelessiw 833 74 28 Dec 2023 844th Jonatan6 🇩🇰 833 74 15 Mar 2024 844th Mandrzejy 🇵🇱 833 74 12 Apr 2024 844th kaurakeksi 🇫🇮 833 74 29 Dec 2024 853rd CLOStrophobic 🇮🇹 833 89 14 Feb 2025 854th Steffan153 🇫🇮 833 97 18 Jan 2023 855th RyanMHsiao 833 159 24 Sep 2024 856th Steffan153 🇫🇮 832 55 21 Dec 2022 857th Shanethegamer 🇺🇸 832 57 15 Dec 2022 857th anter69 🇭🇺 832 57 23 Feb 2023 857th stefangimmillaro 832 57 6 May 2023 860th dokutan 832 88 9 Jun 2024 861st MeWhenI 🇻🇦 832 101 5 May 2022 862nd elisherer 🇮🇱 831 64 5 Jun 2022 862nd Ashikpaul 🇮🇳 831 64 29 Jul 2022 862nd LukeBridges 🇬🇧 831 64 26 Oct 2022 862nd florton 831 64 18 Jan 2023 862nd DayDun 🇸🇪 831 64 24 Jan 2023 862nd lyphyser 831 64 3 Jun 2023 862nd Davr1 🇨🇿 831 64 14 Oct 2023 862nd stellartux 831 64 26 Dec 2023 862nd goodwyna21 831 64 12 Nov 2024 862nd xShadowBlade 831 64 26 Dec 2024 872nd Yewzir 🇧🇪 831 69 24 Dec 2024 873rd nwellnhof 🇩🇪 831 117 16 Nov 2022 874th ovs-code 🇩🇪 830 60 3 Aug 2024 874th GrayJoKing 🇦🇺 830 60 24 Oct 2024 874th Shanethegamer 🇺🇸 830 60 19 Dec 2024 877th alphafalfa 830 65 23 Aug 2024 878th emplv 🇱🇻 830 124 31 Oct 2022 879th Natanaelel 🇸🇪 829 39 10 Feb 2025 880th sean-niemann 🇺🇸 829 67 5 May 2022 880th pschmid0 🇺🇸 829 67 5 Aug 2022 880th arobson13 🇨🇦 829 67 11 Apr 2023 880th janbehrens 🇩🇪 829 67 17 May 2023 884th yashima 829 141 19 Oct 2024 885th rollershutter 828 78 8 Jul 2022 885th destofr 828 78 25 Aug 2022 885th 5quiwyrm 828 78 4 Sep 2022 885th thej10n 828 78 12 Jun 2024 885th SwordF-Official 828 78 24 days ago 890th tkr-sh 🇫🇷 827 102 20 Aug 2022 890th trist224 🇫🇷 827 102 14 Dec 2022 892nd trinityy-7 826 94 7 Mar 2024 892nd Squimbletin 826 94 19 Apr 2025 894th msbranicky 826 100 5 Oct 2023 894th dokutan 826 100 3 Oct 2024 896th kimbo 🇺🇸 826 119 28 Dec 2022 897th GolfingSuccess 🇬🇷 826 150 18 Jan 2025 897th ovs-code 🇩🇪 826 150 27 Mar 2025 899th TaserTheFox 🇺🇸 825 54 31 May 2023 900th sean-niemann 🇺🇸 825 79 23 Oct 2024 Prev 826–900 of 3,028 Next