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 824th stellartux 844 64 26 Dec 2023 824th bac0id 844 64 29 Jun 2024 824th snoozingnewt 🇺🇸 844 64 1 Sep 2024 824th albanian-laundromat 844 64 2 days ago 830th lynn 844 96 11 Jul 2023 831st janAkali 🇷🇺 843 77 12 Feb 2025 832nd bschorno 843 92 12 Oct 2022 832nd ChrisTheisen 843 92 14 Dec 2022 832nd kellantech 843 92 4 Jul 2023 832nd Mezzofloat 843 92 26 Aug 2023 832nd Maximizer02 843 92 1 Oct 2023 832nd madeforlosers 843 92 21 Nov 2024 832nd kmathis22 843 92 20 days ago 839th DialFrost 🇸🇬 842 66 7 Apr 2025 840th SirBogman 🇺🇸 842 89 4 May 2022 841st krcs 🇵🇱 841 53 9 May 2022 841st ryanlanegit 841 53 19 Jun 2022 841st sisyphus-ppcg 🇦🇺 841 53 15 Aug 2022 844th eshilo-draper 839 75 6 Sep 2022 844th kmathis22 839 75 19 days ago 846th raszpi 🇭🇺 839 77 1 Sep 2023 847th ovs-code 🇩🇪 839 161 10 days ago 848th frankgraziano 838 66 20 Apr 2025 849th sean-niemann 🇺🇸 838 76 8 Oct 2024 850th error256 838 81 13 Sep 2024 851st Codsilla 🇨🇦 837 51 1 Jul 2022 852nd Andriamanitra 🇫🇮 836 83 17 Apr 2023 852nd Natanaelel 🇸🇪 836 83 8 Jul 2023 854th CLOStrophobic 🇮🇹 836 89 14 Feb 2025 855th CatsAreFluffy 836 101 18 Feb 2023 855th annaproxy 836 101 9 May 2023 855th wojtekmal 836 101 15 Nov 2023 855th HumanoidCPU 836 101 6 May 2024 855th eMGeeneer 836 101 27 Jun 2024 855th bac0id 836 101 29 Jun 2024 855th michaelmoynihan 836 101 21 days ago 862nd emplv 🇱🇻 836 124 31 Oct 2022 863rd scpchicken 🇵🇼 835 55 4 May 2022 863rd SirBogman 🇺🇸 835 55 5 May 2022 863rd Shanethegamer 🇺🇸 835 55 19 May 2023 863rd DialFrost 🇸🇬 835 55 14 Feb 2025 867th Yewzir 🇧🇪 835 69 24 Dec 2024 868th Steffan153 🇫🇮 835 97 18 Jan 2023 869th cduerm 835 118 5 days ago 870th SirBogman 🇺🇸 834 36 5 May 2022 870th HPWiz 🇳🇿 834 36 7 May 2022 870th Natanaelel 🇸🇪 834 36 15 Jun 2022 870th Steffan153 🇫🇮 834 36 18 Jan 2023 870th codereport 🇨🇦 834 36 1 Jun 2024 870th GolfinK 834 36 21 Nov 2024 870th lifthrasiir 🇰🇷 834 36 1 Dec 2024 870th GolfingSuccess 🇬🇷 834 36 20 Mar 2025 878th ChiefChippy2 834 56 4 May 2022 878th aksyristos 834 56 29 Jan 2023 878th anter69 🇭🇺 834 56 12 Feb 2024 878th 3dm4n 🇫🇮 834 56 11 Mar 2024 878th lgrandco 834 56 9 Oct 2024 878th tatzyr 🇯🇵 834 56 10 Dec 2024 884th moustave 834 67 7 Nov 2024 885th inverseLorentz 🇦🇺 834 69 3 Jun 2024 885th CLOStrophobic 🇮🇹 834 69 28 May 2025 887th Shanethegamer 🇺🇸 834 82 15 May 2023 888th ovs-code 🇩🇪 834 85 11 Dec 2023 889th dokutan 834 88 9 Jun 2024 890th p-vf 🇨🇭 834 93 24 Jun 2022 890th Smetalo 834 93 25 Aug 2022 890th malworthy 834 93 19 Aug 2024 893rd DialFrost 🇸🇬 834 162 11 days ago 893rd emgordon154 834 162 8 days ago 895th Alex-x90 🇺🇸 833 74 4 Dec 2022 895th undersquire 833 74 24 Jun 2023 895th rdmsr 833 74 24 Jun 2023 895th Bmrl7 833 74 9 Jul 2023 895th Vinterion 833 74 6 Nov 2023 895th namelessiw 833 74 28 Dec 2023 Prev 826–900 of 3,318 Next