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 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 Chars Time 825th AlephSquirrel 846 26 6 Jan 2023 825th ovs-code 🇩🇪 846 26 5 May 2024 825th saito-ta 🇯🇵 846 26 12 Dec 2024 829th the-zammers 846 68 2 Oct 2023 830th randolchance 845 63 8 Jan 2023 830th CatsAreFluffy 845 63 18 Feb 2023 830th amiralitaheri 845 63 23 Feb 2023 830th RuyiLi 845 63 1 Apr 2023 830th TaserTheFox 🇺🇸 845 63 25 May 2023 830th pfysches-boop 845 63 6 Aug 2023 830th mhgockel 845 63 19 Aug 2023 830th NickTheEASDude 🇺🇸 845 63 18 Jan 2024 830th 823126 845 63 14 Nov 2024 830th Palladium02 845 63 12 May 2025 830th 4very 845 63 10 Jun 2025 830th gigaprofisi 🇺🇸 845 63 17 Jun 2025 830th CaedenHarper 🇨🇦 845 63 29 Jun 2025 843rd NewDefectus 🇮🇱 845 73 6 May 2022 843rd inventshah 845 73 12 Jun 2022 843rd Natanaelel 🇸🇪 845 73 15 Jun 2022 843rd Herbert00709 🇵🇱 845 73 22 Dec 2023 843rd LorenzoDeGaspari 845 73 27 May 2024 843rd Bpc-CPU 845 73 24 days ago 849th ovs-code 🇩🇪 845 85 11 Dec 2023 850th Shanethegamer 🇺🇸 844 98 26 Oct 2022 850th emgordon154 844 98 18 Feb 2025 852nd jared-hughes 844 100 20 Jul 2022 852nd ZakkkkAttackkkk 🇵🇭 844 100 10 Aug 2022 852nd Walter225 844 100 25 Jul 2023 855th Natanaelel 🇸🇪 843 57 17 Jan 2024 855th Kacarott 🇦🇺 843 57 10 Sep 2024 857th retrohun 843 64 6 Nov 2022 857th Re-Adventures 🇮🇳 843 64 7 Nov 2022 857th stellartux 843 64 26 Dec 2023 857th bac0id 843 64 29 Jun 2024 857th snoozingnewt 🇺🇸 843 64 1 Sep 2024 862nd bschorno 843 92 12 Oct 2022 862nd ChrisTheisen 843 92 14 Dec 2022 862nd kellantech 843 92 4 Jul 2023 862nd Mezzofloat 843 92 26 Aug 2023 862nd Maximizer02 843 92 1 Oct 2023 862nd michelebastione 🇮🇹 843 92 22 Dec 2023 862nd madeforlosers 843 92 21 Nov 2024 869th lynn 843 96 11 Jul 2023 870th janAkali 🇷🇺 842 77 12 Feb 2025 871st krcs 🇵🇱 841 53 9 May 2022 871st ryanlanegit 841 53 19 Jun 2022 871st sisyphus-ppcg 🇦🇺 841 53 15 Aug 2022 874th DialFrost 🇸🇬 841 66 7 Apr 2025 875th Smetalo 841 139 25 Aug 2022 875th ToxicP1e 841 139 2 Mar 2023 877th raszpi 🇭🇺 839 77 1 Sep 2023 878th SirBogman 🇺🇸 839 89 4 May 2022 879th error256 838 81 13 Sep 2024 880th Codsilla 🇨🇦 837 51 1 Jul 2022 881st frankgraziano 837 66 20 Apr 2025 882nd eshilo-draper 837 75 6 Sep 2022 883rd sean-niemann 🇺🇸 837 76 8 Oct 2024 884th MeWhenI 🇻🇦 837 207 21 Apr 2025 885th CatsAreFluffy 836 101 18 Feb 2023 885th annaproxy 836 101 9 May 2023 885th wojtekmal 836 101 15 Nov 2023 885th HumanoidCPU 836 101 6 May 2024 885th eMGeeneer 836 101 27 Jun 2024 885th bac0id 836 101 29 Jun 2024 891st Andriamanitra 🇫🇮 835 83 17 Apr 2023 891st Natanaelel 🇸🇪 835 83 8 Jul 2023 893rd DialFrost 🇸🇬 835 86 15 Dec 2024 894th RyanMHsiao 835 159 24 Sep 2024 895th SirBogman 🇺🇸 834 36 5 May 2022 895th HPWiz 🇳🇿 834 36 7 May 2022 895th Natanaelel 🇸🇪 834 36 15 Jun 2022 895th Steffan153 🇫🇮 834 36 18 Jan 2023 895th codereport 🇨🇦 834 36 1 Jun 2024 895th GolfinK 834 36 21 Nov 2024 Prev 826–900 of 3,208 Next