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 826th JayXon 🇺🇸 847 56 9 May 2022 827th azka1368 847 138 23 Nov 2023 828th MeWhenI 🇻🇦 846 26 25 Aug 2022 828th AlephSquirrel 846 26 6 Jan 2023 828th ovs-code 🇩🇪 846 26 5 May 2024 828th saito-ta 🇯🇵 846 26 12 Dec 2024 832nd the-zammers 846 68 2 Oct 2023 833rd randolchance 845 63 8 Jan 2023 833rd CatsAreFluffy 845 63 18 Feb 2023 833rd amiralitaheri 845 63 23 Feb 2023 833rd RuyiLi 845 63 1 Apr 2023 833rd TaserTheFox 🇺🇸 845 63 25 May 2023 833rd pfysches-boop 845 63 6 Aug 2023 833rd mhgockel 845 63 19 Aug 2023 833rd NickTheEASDude 🇺🇸 845 63 18 Jan 2024 833rd 823126 845 63 14 Nov 2024 833rd Palladium02 845 63 12 May 2025 833rd 4very 845 63 10 Jun 2025 833rd gigaprofisi 🇺🇸 845 63 17 Jun 2025 833rd CaedenHarper 🇨🇦 845 63 29 Jun 2025 846th NewDefectus 🇮🇱 845 73 6 May 2022 846th inventshah 845 73 12 Jun 2022 846th Natanaelel 🇸🇪 845 73 15 Jun 2022 846th Herbert00709 🇵🇱 845 73 22 Dec 2023 846th LorenzoDeGaspari 845 73 27 May 2024 846th Bpc-CPU 845 73 12 Jul 2025 852nd ovs-code 🇩🇪 845 85 11 Dec 2023 853rd Shanethegamer 🇺🇸 844 98 26 Oct 2022 853rd emgordon154 844 98 18 Feb 2025 855th jared-hughes 844 100 20 Jul 2022 855th ZakkkkAttackkkk 🇵🇭 844 100 10 Aug 2022 855th Walter225 844 100 25 Jul 2023 858th Natanaelel 🇸🇪 843 57 17 Jan 2024 858th Kacarott 🇦🇺 843 57 10 Sep 2024 860th retrohun 843 64 6 Nov 2022 860th Re-Adventures 🇮🇳 843 64 7 Nov 2022 860th stellartux 843 64 26 Dec 2023 860th bac0id 843 64 29 Jun 2024 860th snoozingnewt 🇺🇸 843 64 1 Sep 2024 865th bschorno 843 92 12 Oct 2022 865th ChrisTheisen 843 92 14 Dec 2022 865th kellantech 843 92 4 Jul 2023 865th Mezzofloat 843 92 26 Aug 2023 865th Maximizer02 843 92 1 Oct 2023 865th michelebastione 🇮🇹 843 92 22 Dec 2023 865th madeforlosers 843 92 21 Nov 2024 872nd lynn 843 96 11 Jul 2023 873rd janAkali 🇷🇺 842 77 12 Feb 2025 874th krcs 🇵🇱 841 53 9 May 2022 874th ryanlanegit 841 53 19 Jun 2022 874th sisyphus-ppcg 🇦🇺 841 53 15 Aug 2022 877th DialFrost 🇸🇬 841 66 7 Apr 2025 878th Smetalo 841 139 25 Aug 2022 878th ToxicP1e 841 139 2 Mar 2023 880th raszpi 🇭🇺 839 77 1 Sep 2023 881st SirBogman 🇺🇸 839 89 4 May 2022 882nd error256 838 81 13 Sep 2024 883rd Codsilla 🇨🇦 837 51 1 Jul 2022 884th frankgraziano 837 66 20 Apr 2025 885th eshilo-draper 837 75 6 Sep 2022 886th sean-niemann 🇺🇸 837 76 8 Oct 2024 887th CatsAreFluffy 836 101 18 Feb 2023 887th annaproxy 836 101 9 May 2023 887th wojtekmal 836 101 15 Nov 2023 887th HumanoidCPU 836 101 6 May 2024 887th eMGeeneer 836 101 27 Jun 2024 887th bac0id 836 101 29 Jun 2024 893rd Andriamanitra 🇫🇮 835 83 17 Apr 2023 893rd Natanaelel 🇸🇪 835 83 8 Jul 2023 895th DialFrost 🇸🇬 835 86 15 Dec 2024 896th RyanMHsiao 835 159 24 Sep 2024 897th SirBogman 🇺🇸 834 36 5 May 2022 897th HPWiz 🇳🇿 834 36 7 May 2022 897th Natanaelel 🇸🇪 834 36 15 Jun 2022 897th Steffan153 🇫🇮 834 36 18 Jan 2023 Prev 826–900 of 3,220 Next