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 824th emgordon154 850 92 27 May 2025 827th SirBogman 🇺🇸 849 55 5 May 2022 827th olivermrose 🇺🇸 849 55 6 May 2022 827th 4hg 🇺🇸 849 55 24 Aug 2022 827th DialFrost 🇸🇬 849 55 1 Jan 2023 827th error256 849 55 4 May 2024 832nd Shanethegamer 🇺🇸 849 99 27 Apr 2023 833rd Re-Adventures 🇮🇳 849 116 16 Jul 2023 833rd Yewzir 🇧🇪 849 116 7 Feb 2024 835th azka1368 848 138 23 Nov 2023 836th JayXon 🇺🇸 847 56 9 May 2022 837th MeWhenI 🇻🇦 846 26 25 Aug 2022 837th AlephSquirrel 846 26 6 Jan 2023 837th ovs-code 🇩🇪 846 26 5 May 2024 837th saito-ta 🇯🇵 846 26 12 Dec 2024 841st the-zammers 846 68 2 Oct 2023 842nd randolchance 845 63 8 Jan 2023 842nd CatsAreFluffy 845 63 18 Feb 2023 842nd amiralitaheri 845 63 23 Feb 2023 842nd RuyiLi 845 63 1 Apr 2023 842nd TaserTheFox 🇺🇸 845 63 25 May 2023 842nd pfysches-boop 845 63 6 Aug 2023 842nd mhgockel 845 63 19 Aug 2023 842nd NickTheEASDude 🇺🇸 845 63 18 Jan 2024 842nd 823126 845 63 14 Nov 2024 842nd Palladium02 845 63 12 May 2025 842nd 4very 845 63 10 Jun 2025 842nd gigaprofisi 🇺🇸 845 63 17 Jun 2025 842nd Ultra814 845 63 23 days ago 855th NewDefectus 🇮🇱 845 73 6 May 2022 855th inventshah 845 73 12 Jun 2022 855th Natanaelel 🇸🇪 845 73 15 Jun 2022 855th Herbert00709 🇵🇱 845 73 22 Dec 2023 855th LorenzoDeGaspari 845 73 27 May 2024 855th Bpc-CPU 845 73 12 Jul 2025 861st jared-hughes 845 100 20 Jul 2022 861st ZakkkkAttackkkk 🇵🇭 845 100 10 Aug 2022 861st Walter225 845 100 25 Jul 2023 864th Natanaelel 🇸🇪 844 57 17 Jan 2024 864th Kacarott 🇦🇺 844 57 10 Sep 2024 866th lynn 844 96 11 Jul 2023 867th Shanethegamer 🇺🇸 844 98 26 Oct 2022 867th emgordon154 844 98 18 Feb 2025 869th retrohun 843 64 6 Nov 2022 869th Re-Adventures 🇮🇳 843 64 7 Nov 2022 869th stellartux 843 64 26 Dec 2023 869th bac0id 843 64 29 Jun 2024 869th snoozingnewt 🇺🇸 843 64 1 Sep 2024 874th janAkali 🇷🇺 843 77 12 Feb 2025 875th bschorno 843 92 12 Oct 2022 875th ChrisTheisen 843 92 14 Dec 2022 875th kellantech 843 92 4 Jul 2023 875th Mezzofloat 843 92 26 Aug 2023 875th Maximizer02 843 92 1 Oct 2023 875th madeforlosers 843 92 21 Nov 2024 875th kmathis22 843 92 9 days ago 882nd DialFrost 🇸🇬 842 66 7 Apr 2025 883rd SirBogman 🇺🇸 842 89 4 May 2022 884th Smetalo 842 139 25 Aug 2022 884th ToxicP1e 842 139 2 Mar 2023 886th krcs 🇵🇱 841 53 9 May 2022 886th ryanlanegit 841 53 19 Jun 2022 886th sisyphus-ppcg 🇦🇺 841 53 15 Aug 2022 889th eshilo-draper 839 75 6 Sep 2022 889th kmathis22 839 75 8 days ago 891st raszpi 🇭🇺 839 77 1 Sep 2023 892nd frankgraziano 838 66 20 Apr 2025 893rd sean-niemann 🇺🇸 838 76 8 Oct 2024 894th error256 838 81 13 Sep 2024 895th Codsilla 🇨🇦 837 51 1 Jul 2022 896th Andriamanitra 🇫🇮 836 83 17 Apr 2023 896th Natanaelel 🇸🇪 836 83 8 Jul 2023 898th CatsAreFluffy 836 101 18 Feb 2023 898th annaproxy 836 101 9 May 2023 898th wojtekmal 836 101 15 Nov 2023 Prev 826–900 of 3,293 Next