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 825th emgordon154 845 98 18 Feb 2025 827th jared-hughes 845 100 20 Jul 2022 827th ZakkkkAttackkkk 🇵🇭 845 100 10 Aug 2022 827th Walter225 845 100 25 Jul 2023 830th Natanaelel 🇸🇪 844 57 17 Jan 2024 830th Kacarott 🇦🇺 844 57 10 Sep 2024 832nd retrohun 844 64 6 Nov 2022 832nd Re-Adventures 🇮🇳 844 64 7 Nov 2022 832nd stellartux 844 64 26 Dec 2023 832nd bac0id 844 64 29 Jun 2024 832nd snoozingnewt 🇺🇸 844 64 1 Sep 2024 832nd albanian-laundromat 844 64 6 days ago 838th janAkali 🇷🇺 843 77 12 Feb 2025 839th bschorno 843 92 12 Oct 2022 839th ChrisTheisen 843 92 14 Dec 2022 839th kellantech 843 92 4 Jul 2023 839th Mezzofloat 843 92 26 Aug 2023 839th Maximizer02 843 92 1 Oct 2023 839th madeforlosers 843 92 21 Nov 2024 845th DialFrost 🇸🇬 842 66 7 Apr 2025 846th SirBogman 🇺🇸 842 89 4 May 2022 847th krcs 🇵🇱 841 53 9 May 2022 847th ryanlanegit 841 53 19 Jun 2022 847th sisyphus-ppcg 🇦🇺 841 53 15 Aug 2022 850th dokutan 841 93 30 hours ago 851st eshilo-draper 839 75 6 Sep 2022 851st kmathis22 839 75 23 days ago 853rd sean-niemann 🇺🇸 839 76 8 Oct 2024 854th raszpi 🇭🇺 839 77 1 Sep 2023 855th ovs-code 🇩🇪 839 161 14 days ago 856th frankgraziano 838 66 20 Apr 2025 857th error256 838 81 13 Sep 2024 858th Codsilla 🇨🇦 837 51 1 Jul 2022 859th Andriamanitra 🇫🇮 837 83 17 Apr 2023 859th Natanaelel 🇸🇪 837 83 8 Jul 2023 861st Steffan153 🇫🇮 837 97 18 Jan 2023 862nd CLOStrophobic 🇮🇹 836 89 14 Feb 2025 863rd CatsAreFluffy 836 101 18 Feb 2023 863rd annaproxy 836 101 9 May 2023 863rd wojtekmal 836 101 15 Nov 2023 863rd HumanoidCPU 836 101 6 May 2024 863rd eMGeeneer 836 101 27 Jun 2024 863rd bac0id 836 101 29 Jun 2024 863rd michaelmoynihan 836 101 24 days ago 870th emplv 🇱🇻 836 124 31 Oct 2022 871st scpchicken 🇵🇼 835 55 4 May 2022 871st SirBogman 🇺🇸 835 55 5 May 2022 871st Shanethegamer 🇺🇸 835 55 19 May 2023 871st DialFrost 🇸🇬 835 55 14 Feb 2025 875th Yewzir 🇧🇪 835 69 24 Dec 2024 876th ovs-code 🇩🇪 835 85 11 Dec 2023 877th cduerm 835 118 9 days ago 878th SirBogman 🇺🇸 834 36 5 May 2022 878th HPWiz 🇳🇿 834 36 7 May 2022 878th Natanaelel 🇸🇪 834 36 15 Jun 2022 878th Steffan153 🇫🇮 834 36 18 Jan 2023 878th codereport 🇨🇦 834 36 1 Jun 2024 878th GolfinK 834 36 21 Nov 2024 878th lifthrasiir 🇰🇷 834 36 1 Dec 2024 878th GolfingSuccess 🇬🇷 834 36 20 Mar 2025 886th ChiefChippy2 834 56 4 May 2022 886th aksyristos 834 56 29 Jan 2023 886th anter69 🇭🇺 834 56 12 Feb 2024 886th 3dm4n 🇫🇮 834 56 11 Mar 2024 886th lgrandco 834 56 9 Oct 2024 886th tatzyr 🇯🇵 834 56 10 Dec 2024 892nd moustave 834 67 7 Nov 2024 893rd inverseLorentz 🇦🇺 834 69 3 Jun 2024 893rd CLOStrophobic 🇮🇹 834 69 28 May 2025 895th Shanethegamer 🇺🇸 834 82 15 May 2023 896th dokutan 834 88 9 Jun 2024 897th p-vf 🇨🇭 834 93 24 Jun 2022 897th Smetalo 834 93 25 Aug 2022 897th malworthy 834 93 19 Aug 2024 900th DialFrost 🇸🇬 834 162 14 days ago Prev 826–900 of 3,332 Next