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 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 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 Mandelbrot 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 Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 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 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 Mandelbrot 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 NewDefectus 🇮🇱 844 73 6 May 2022 826th inventshah 844 73 12 Jun 2022 826th Natanaelel 🇸🇪 844 73 15 Jun 2022 826th 5quiwyrm 844 73 19 Oct 2022 826th Herbert00709 🇵🇱 844 73 22 Dec 2023 826th LorenzoDeGaspari 844 73 27 May 2024 832nd jared-hughes 844 100 20 Jul 2022 832nd ZakkkkAttackkkk 🇵🇭 844 100 10 Aug 2022 832nd Walter225 844 100 25 Jul 2023 835th Natanaelel 🇸🇪 843 57 17 Jan 2024 835th Kacarott 🇦🇺 843 57 10 Sep 2024 837th retrohun 843 64 6 Nov 2022 837th Re-Adventures 🇮🇳 843 64 7 Nov 2022 837th stellartux 843 64 26 Dec 2023 837th bac0id 843 64 29 Jun 2024 837th snoozingnewt 🇺🇸 843 64 1 Sep 2024 842nd DialFrost 🇸🇬 843 86 15 Dec 2024 843rd Shanethegamer 🇺🇸 843 98 26 Oct 2022 843rd emgordon154 843 98 18 Feb 2025 845th bschorno 842 92 12 Oct 2022 845th ChrisTheisen 842 92 14 Dec 2022 845th kellantech 842 92 4 Jul 2023 845th Mezzofloat 842 92 26 Aug 2023 845th Maximizer02 842 92 1 Oct 2023 845th michelebastione 🇮🇹 842 92 22 Dec 2023 845th madeforlosers 842 92 21 Nov 2024 852nd krcs 🇵🇱 841 53 9 May 2022 852nd ryanlanegit 841 53 19 Jun 2022 852nd sisyphus-ppcg 🇦🇺 841 53 15 Aug 2022 855th DialFrost 🇸🇬 841 66 7 Apr 2025 856th Shanethegamer 🇺🇸 841 82 15 May 2023 857th lynn 841 96 11 Jul 2023 858th Smetalo 841 139 25 Aug 2022 858th ToxicP1e 841 139 2 Mar 2023 860th janAkali 🇷🇺 840 77 12 Feb 2025 861st raszpi 🇭🇺 838 77 1 Sep 2023 862nd error256 838 81 13 Sep 2024 863rd primo-ppcg 🇹🇭 838 215 31 hours ago 864th Codsilla 🇨🇦 837 51 1 Jul 2022 865th frankgraziano 836 66 20 Apr 2025 866th SirBogman 🇺🇸 836 89 4 May 2022 867th CatsAreFluffy 836 101 18 Feb 2023 867th annaproxy 836 101 9 May 2023 867th wojtekmal 836 101 15 Nov 2023 867th HumanoidCPU 836 101 6 May 2024 867th eMGeeneer 836 101 27 Jun 2024 867th bac0id 836 101 29 Jun 2024 873rd eshilo-draper 835 75 6 Sep 2022 874th sean-niemann 🇺🇸 835 76 8 Oct 2024 875th Andriamanitra 🇫🇮 835 83 17 Apr 2023 875th Natanaelel 🇸🇪 835 83 8 Jul 2023 877th SirBogman 🇺🇸 834 36 5 May 2022 877th HPWiz 🇳🇿 834 36 7 May 2022 877th Natanaelel 🇸🇪 834 36 15 Jun 2022 877th Steffan153 🇫🇮 834 36 18 Jan 2023 877th codereport 🇨🇦 834 36 1 Jun 2024 877th GolfinK 834 36 21 Nov 2024 877th lifthrasiir 🇰🇷 834 36 1 Dec 2024 877th GolfingSuccess 🇬🇷 834 36 20 Mar 2025 885th scpchicken 🇵🇼 834 55 4 May 2022 885th SirBogman 🇺🇸 834 55 5 May 2022 885th Shanethegamer 🇺🇸 834 55 19 May 2023 885th DialFrost 🇸🇬 834 55 14 Feb 2025 889th inverseLorentz 🇦🇺 834 69 3 Jun 2024 889th CLOStrophobic 🇮🇹 834 69 28 May 2025 891st ChiefChippy2 833 56 4 May 2022 891st aksyristos 833 56 29 Jan 2023 891st anter69 🇭🇺 833 56 12 Feb 2024 891st 3dm4n 🇫🇮 833 56 11 Mar 2024 891st lgrandco 833 56 9 Oct 2024 891st tatzyr 🇯🇵 833 56 10 Dec 2024 897th moustave 833 67 7 Nov 2024 898th Alex-x90 🇺🇸 833 74 4 Dec 2022 898th undersquire 833 74 24 Jun 2023 898th rdmsr 833 74 24 Jun 2023 Prev 826–900 of 3,132 Next