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 Smooth 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 Luau 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 Luau 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 Smooth Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Chars Time 826th MeWhenI 🇻🇦 850 92 10 Oct 2022 826th Betuaredead 850 92 5 Jan 2023 826th emgordon154 850 92 27 May 2025 829th SirBogman 🇺🇸 849 55 5 May 2022 829th olivermrose 🇺🇸 849 55 6 May 2022 829th 4hg 🇺🇸 849 55 24 Aug 2022 829th DialFrost 🇸🇬 849 55 1 Jan 2023 829th error256 849 55 4 May 2024 834th Shanethegamer 🇺🇸 849 99 27 Apr 2023 835th Re-Adventures 🇮🇳 849 116 16 Jul 2023 835th Yewzir 🇧🇪 849 116 7 Feb 2024 837th azka1368 848 138 23 Nov 2023 838th JayXon 🇺🇸 847 56 9 May 2022 839th MeWhenI 🇻🇦 846 26 25 Aug 2022 839th AlephSquirrel 846 26 6 Jan 2023 839th ovs-code 🇩🇪 846 26 5 May 2024 839th saito-ta 🇯🇵 846 26 12 Dec 2024 843rd Shanethegamer 🇺🇸 846 58 4 days ago 844th randolchance 846 63 8 Jan 2023 844th CatsAreFluffy 846 63 18 Feb 2023 844th amiralitaheri 846 63 23 Feb 2023 844th RuyiLi 846 63 1 Apr 2023 844th TaserTheFox 🇺🇸 846 63 25 May 2023 844th pfysches-boop 846 63 6 Aug 2023 844th mhgockel 846 63 19 Aug 2023 844th NickTheEASDude 🇺🇸 846 63 18 Jan 2024 844th 823126 846 63 14 Nov 2024 844th Palladium02 846 63 12 May 2025 844th 4very 846 63 10 Jun 2025 844th gigaprofisi 🇺🇸 846 63 17 Jun 2025 844th Ultra814 846 63 21 Aug 2025 844th alexsave 846 63 5 days ago 858th the-zammers 846 68 2 Oct 2023 859th NewDefectus 🇮🇱 845 73 6 May 2022 859th inventshah 845 73 12 Jun 2022 859th Natanaelel 🇸🇪 845 73 15 Jun 2022 859th Herbert00709 🇵🇱 845 73 22 Dec 2023 859th LorenzoDeGaspari 845 73 27 May 2024 859th Bpc-CPU 845 73 12 Jul 2025 859th AZTECCO 845 73 4 days ago 866th jared-hughes 845 100 20 Jul 2022 866th ZakkkkAttackkkk 🇵🇭 845 100 10 Aug 2022 866th Walter225 845 100 25 Jul 2023 869th Natanaelel 🇸🇪 844 57 17 Jan 2024 869th Kacarott 🇦🇺 844 57 10 Sep 2024 871st lynn 844 96 11 Jul 2023 872nd Shanethegamer 🇺🇸 844 98 26 Oct 2022 872nd emgordon154 844 98 18 Feb 2025 874th retrohun 843 64 6 Nov 2022 874th Re-Adventures 🇮🇳 843 64 7 Nov 2022 874th stellartux 843 64 26 Dec 2023 874th bac0id 843 64 29 Jun 2024 874th snoozingnewt 🇺🇸 843 64 1 Sep 2024 879th janAkali 🇷🇺 843 77 12 Feb 2025 880th bschorno 843 92 12 Oct 2022 880th ChrisTheisen 843 92 14 Dec 2022 880th kellantech 843 92 4 Jul 2023 880th Mezzofloat 843 92 26 Aug 2023 880th Maximizer02 843 92 1 Oct 2023 880th madeforlosers 843 92 21 Nov 2024 880th kmathis22 843 92 16 days ago 887th DialFrost 🇸🇬 842 66 7 Apr 2025 888th SirBogman 🇺🇸 842 89 4 May 2022 889th Smetalo 842 139 25 Aug 2022 889th ToxicP1e 842 139 2 Mar 2023 891st krcs 🇵🇱 841 53 9 May 2022 891st ryanlanegit 841 53 19 Jun 2022 891st sisyphus-ppcg 🇦🇺 841 53 15 Aug 2022 894th eshilo-draper 839 75 6 Sep 2022 894th kmathis22 839 75 15 days ago 896th raszpi 🇭🇺 839 77 1 Sep 2023 897th ovs-code 🇩🇪 839 161 6 days ago 898th frankgraziano 838 66 20 Apr 2025 899th sean-niemann 🇺🇸 838 76 8 Oct 2024 900th error256 838 81 13 Sep 2024 Prev 826–900 of 3,307 Next