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 ZakkkkAttackkkk 🇵🇭 845 100 10 Aug 2022 825th Walter225 845 100 25 Jul 2023 828th Natanaelel 🇸🇪 844 57 17 Jan 2024 828th Kacarott 🇦🇺 844 57 10 Sep 2024 830th retrohun 844 64 6 Nov 2022 830th Re-Adventures 🇮🇳 844 64 7 Nov 2022 830th stellartux 844 64 26 Dec 2023 830th bac0id 844 64 29 Jun 2024 830th snoozingnewt 🇺🇸 844 64 1 Sep 2024 830th albanian-laundromat 844 64 4 days ago 836th lynn 844 96 11 Jul 2023 837th janAkali 🇷🇺 843 77 12 Feb 2025 838th bschorno 843 92 12 Oct 2022 838th ChrisTheisen 843 92 14 Dec 2022 838th kellantech 843 92 4 Jul 2023 838th Mezzofloat 843 92 26 Aug 2023 838th Maximizer02 843 92 1 Oct 2023 838th madeforlosers 843 92 21 Nov 2024 844th DialFrost 🇸🇬 842 66 7 Apr 2025 845th SirBogman 🇺🇸 842 89 4 May 2022 846th krcs 🇵🇱 841 53 9 May 2022 846th ryanlanegit 841 53 19 Jun 2022 846th sisyphus-ppcg 🇦🇺 841 53 15 Aug 2022 849th eshilo-draper 839 75 6 Sep 2022 849th kmathis22 839 75 21 days ago 851st sean-niemann 🇺🇸 839 76 8 Oct 2024 852nd raszpi 🇭🇺 839 77 1 Sep 2023 853rd ovs-code 🇩🇪 839 161 12 days ago 854th frankgraziano 838 66 20 Apr 2025 855th error256 838 81 13 Sep 2024 856th Codsilla 🇨🇦 837 51 1 Jul 2022 857th Andriamanitra 🇫🇮 837 83 17 Apr 2023 857th Natanaelel 🇸🇪 837 83 8 Jul 2023 859th CLOStrophobic 🇮🇹 836 89 14 Feb 2025 860th CatsAreFluffy 836 101 18 Feb 2023 860th annaproxy 836 101 9 May 2023 860th wojtekmal 836 101 15 Nov 2023 860th HumanoidCPU 836 101 6 May 2024 860th eMGeeneer 836 101 27 Jun 2024 860th bac0id 836 101 29 Jun 2024 860th michaelmoynihan 836 101 23 days ago 867th emplv 🇱🇻 836 124 31 Oct 2022 868th scpchicken 🇵🇼 835 55 4 May 2022 868th SirBogman 🇺🇸 835 55 5 May 2022 868th Shanethegamer 🇺🇸 835 55 19 May 2023 868th DialFrost 🇸🇬 835 55 14 Feb 2025 872nd Yewzir 🇧🇪 835 69 24 Dec 2024 873rd ovs-code 🇩🇪 835 85 11 Dec 2023 874th Steffan153 🇫🇮 835 97 18 Jan 2023 875th cduerm 835 118 7 days ago 876th SirBogman 🇺🇸 834 36 5 May 2022 876th HPWiz 🇳🇿 834 36 7 May 2022 876th Natanaelel 🇸🇪 834 36 15 Jun 2022 876th Steffan153 🇫🇮 834 36 18 Jan 2023 876th codereport 🇨🇦 834 36 1 Jun 2024 876th GolfinK 834 36 21 Nov 2024 876th lifthrasiir 🇰🇷 834 36 1 Dec 2024 876th GolfingSuccess 🇬🇷 834 36 20 Mar 2025 884th ChiefChippy2 834 56 4 May 2022 884th aksyristos 834 56 29 Jan 2023 884th anter69 🇭🇺 834 56 12 Feb 2024 884th 3dm4n 🇫🇮 834 56 11 Mar 2024 884th lgrandco 834 56 9 Oct 2024 884th tatzyr 🇯🇵 834 56 10 Dec 2024 890th moustave 834 67 7 Nov 2024 891st inverseLorentz 🇦🇺 834 69 3 Jun 2024 891st CLOStrophobic 🇮🇹 834 69 28 May 2025 893rd Shanethegamer 🇺🇸 834 82 15 May 2023 894th dokutan 834 88 9 Jun 2024 895th p-vf 🇨🇭 834 93 24 Jun 2022 895th Smetalo 834 93 25 Aug 2022 895th malworthy 834 93 19 Aug 2024 898th DialFrost 🇸🇬 834 162 13 days ago 898th emgordon154 834 162 9 days ago 900th Alex-x90 🇺🇸 833 74 4 Dec 2022 Prev 826–900 of 3,329 Next