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 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 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 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 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 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 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 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 Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Chars Time 822nd stackotter 850 74 29 May 2023 822nd ovs-code 🇩🇪 850 74 17 Apr 2024 822nd madeforlosers 850 74 21 Nov 2024 829th MeWhenI 🇻🇦 850 92 10 Oct 2022 829th Betuaredead 850 92 5 Jan 2023 829th emgordon154 850 92 27 May 2025 832nd SirBogman 🇺🇸 849 55 5 May 2022 832nd olivermrose 🇺🇸 849 55 6 May 2022 832nd 4hg 🇺🇸 849 55 24 Aug 2022 832nd DialFrost 🇸🇬 849 55 1 Jan 2023 832nd error256 849 55 4 May 2024 837th Shanethegamer 🇺🇸 849 99 27 Apr 2023 838th Re-Adventures 🇮🇳 848 116 16 Jul 2023 838th Yewzir 🇧🇪 848 116 7 Feb 2024 840th azka1368 848 138 23 Nov 2023 841st JayXon 🇺🇸 847 56 9 May 2022 842nd MeWhenI 🇻🇦 846 26 25 Aug 2022 842nd AlephSquirrel 846 26 6 Jan 2023 842nd ovs-code 🇩🇪 846 26 5 May 2024 842nd saito-ta 🇯🇵 846 26 12 Dec 2024 846th Shanethegamer 🇺🇸 846 59 7 days ago 846th albanian-laundromat 846 59 5 days ago 848th the-zammers 846 68 2 Oct 2023 849th randolchance 845 63 8 Jan 2023 849th CatsAreFluffy 845 63 18 Feb 2023 849th amiralitaheri 845 63 23 Feb 2023 849th RuyiLi 845 63 1 Apr 2023 849th TaserTheFox 🇺🇸 845 63 25 May 2023 849th pfysches-boop 845 63 6 Aug 2023 849th mhgockel 845 63 19 Aug 2023 849th NickTheEASDude 🇺🇸 845 63 18 Jan 2024 849th 823126 845 63 14 Nov 2024 849th Palladium02 845 63 12 May 2025 849th 4very 845 63 10 Jun 2025 849th gigaprofisi 🇺🇸 845 63 17 Jun 2025 849th Ultra814 845 63 15 days ago 862nd NewDefectus 🇮🇱 845 73 6 May 2022 862nd inventshah 845 73 12 Jun 2022 862nd Natanaelel 🇸🇪 845 73 15 Jun 2022 862nd Herbert00709 🇵🇱 845 73 22 Dec 2023 862nd LorenzoDeGaspari 845 73 27 May 2024 862nd Bpc-CPU 845 73 12 Jul 2025 868th jared-hughes 845 100 20 Jul 2022 868th ZakkkkAttackkkk 🇵🇭 845 100 10 Aug 2022 868th Walter225 845 100 25 Jul 2023 871st Natanaelel 🇸🇪 844 57 17 Jan 2024 871st Kacarott 🇦🇺 844 57 10 Sep 2024 873rd lynn 844 96 11 Jul 2023 874th Shanethegamer 🇺🇸 844 98 26 Oct 2022 874th emgordon154 844 98 18 Feb 2025 876th retrohun 843 64 6 Nov 2022 876th Re-Adventures 🇮🇳 843 64 7 Nov 2022 876th stellartux 843 64 26 Dec 2023 876th bac0id 843 64 29 Jun 2024 876th snoozingnewt 🇺🇸 843 64 1 Sep 2024 881st janAkali 🇷🇺 843 77 12 Feb 2025 882nd bschorno 843 92 12 Oct 2022 882nd ChrisTheisen 843 92 14 Dec 2022 882nd kellantech 843 92 4 Jul 2023 882nd Mezzofloat 843 92 26 Aug 2023 882nd Maximizer02 843 92 1 Oct 2023 882nd madeforlosers 843 92 21 Nov 2024 882nd kmathis22 843 92 28 hours ago 889th DialFrost 🇸🇬 842 66 7 Apr 2025 890th Smetalo 842 139 25 Aug 2022 890th ToxicP1e 842 139 2 Mar 2023 892nd krcs 🇵🇱 841 53 9 May 2022 892nd ryanlanegit 841 53 19 Jun 2022 892nd sisyphus-ppcg 🇦🇺 841 53 15 Aug 2022 895th SirBogman 🇺🇸 841 89 4 May 2022 896th eshilo-draper 839 75 6 Sep 2022 896th kmathis22 839 75 9 hours ago 898th raszpi 🇭🇺 839 77 1 Sep 2023 899th frankgraziano 838 66 20 Apr 2025 900th sean-niemann 🇺🇸 838 76 8 Oct 2024 Prev 826–900 of 3,297 Next