Collatz in C 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 Trinomial Triangle 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 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 Trinomial Triangle 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 Turtle Tutorial # Golfer Points Chars Time Submitted 1st Lydxn 🇨🇦 1,000 64 9ms 21 Dec 2023 1st rhdqor213 1,000 64 7ms 10 Aug 2024 3rd nai62 941 68 8ms 27 Aug 2022 4th trinityy-7 928 69 2ms 7 Aug 2025 5th GrayJoKing 🇦🇺 914 70 2ms 6 May 2022 5th ovs-code 🇩🇪 914 70 2ms 8 Oct 2023 5th 09cf 914 70 13ms 8 Oct 2023 5th saito-ta 🇯🇵 914 70 3ms 21 Dec 2023 5th sean-niemann 🇺🇸 914 70 3ms 10 Jul 2024 5th KasperKivimaeki 🇫🇮 914 70 6ms 8 Aug 2025 11th GolfingSuccess 🇬🇷 901 71 2ms 5 May 2022 11th emplv 🇱🇻 901 71 3ms 5 May 2022 11th JayXon 🇺🇸 901 71 2ms 7 May 2022 11th m-tkach 🇺🇦 901 71 2ms 15 May 2022 11th nwellnhof 🇩🇪 901 71 2ms 5 Jun 2022 11th Irratix 🇳🇱 901 71 3ms 13 Jun 2022 11th michael-pruglo 🇺🇦 901 71 3ms 13 Jul 2022 11th stefangimmillaro 901 71 2ms 2 Jun 2023 11th kkoenig 901 71 3ms 21 Dec 2023 11th JohandeRuiter 🇳🇱 901 71 3ms 14 Sep 2024 11th masinag 🇮🇹 901 71 2ms 6 Oct 2024 22nd jared-hughes 889 72 3ms 6 Jul 2022 22nd Steffan153 🇫🇮 889 72 3ms 3 Jan 2023 22nd MeWhenI 🇻🇦 889 72 2ms 7 May 2023 22nd ListeriaM 889 72 2ms 22 Aug 2023 22nd larcherMTT 889 72 3ms 5 Oct 2024 22nd snyderek 🇺🇸 889 72 3ms 19 Feb 2025 22nd 5quiwyrm 889 72 3ms 29 Jun 2025 22nd TeodorDyakov 🇧🇬 889 72 2ms 8 Jul 2025 22nd xiaoyiming123 889 72 2ms 12 Jul 2025 31st NewDefectus 🇮🇱 877 73 3ms 6 May 2022 31st inventshah 877 73 3ms 12 Jun 2022 31st Natanaelel 🇸🇪 877 73 2ms 15 Jun 2022 31st Herbert00709 🇵🇱 877 73 3ms 22 Dec 2023 31st LorenzoDeGaspari 877 73 3ms 27 May 2024 31st Bpc-CPU 877 73 2ms 12 Jul 2025 31st AZTECCO 877 73 3ms 16 Sep 2025 31st CaedenHarper 🇨🇦 877 73 3ms 27 days ago 39th Alex-x90 🇺🇸 865 74 2ms 4 Dec 2022 39th undersquire 865 74 3ms 24 Jun 2023 39th rdmsr 865 74 2ms 24 Jun 2023 39th Bmrl7 865 74 3ms 9 Jul 2023 39th Vinterion 865 74 3ms 6 Nov 2023 39th namelessiw 865 74 3ms 28 Dec 2023 39th Jonatan6 🇩🇰 865 74 3ms 15 Mar 2024 39th Mandrzejy 🇵🇱 865 74 5ms 12 Apr 2024 39th kaurakeksi 🇫🇮 865 74 3ms 29 Dec 2024 48th AlephSquirrel 853 75 2ms 12 Jan 2023 48th Yewzir 🇧🇪 853 75 2ms 22 Apr 2023 48th Shanethegamer 🇺🇸 853 75 2ms 15 May 2023 48th imma-Spring 853 75 3ms 15 Nov 2023 48th noahgitsham 853 75 2ms 20 Jun 2024 48th not-a-pokemon 853 75 3ms 13 Apr 2025 54th ZakkkkAttackkkk 🇵🇭 842 76 3ms 23 Jul 2022 54th janbehrens 🇩🇪 842 76 3ms 21 Apr 2023 54th abc7-12 842 76 3ms 6 May 2024 54th heanyang1 842 76 3ms 20 May 2024 54th fuzzylojik-golf 🇺🇸 842 76 2ms 1 Jun 2025 54th Yax42 🇫🇷 842 76 4ms 10 days ago 60th madex 🇩🇪 831 77 3ms 12 Nov 2022 60th aksyristos 831 77 3ms 12 Dec 2022 60th elgan65536 831 77 3ms 4 Nov 2023 60th dokutan 831 77 2ms 17 Mar 2024 60th Flying-Toast 831 77 2ms 17 Apr 2024 60th Iznoanygod 🇺🇸 831 77 3ms 26 Apr 2025 60th DialFrost 🇸🇬 831 77 2ms 26 Aug 2025 67th shellbertt 🇨🇦 821 78 3ms 4 May 2022 67th Heathcorp 🇦🇺 821 78 2ms 7 May 2022 67th Attero 🇸🇪 821 78 2ms 3 Aug 2022 67th ibexq 821 78 3ms 29 Sep 2022 67th Re-Adventures 🇮🇳 821 78 2ms 7 Nov 2022 67th Betuaredead 821 78 2ms 5 Jan 2023 67th User2654 821 78 2ms 8 Feb 2023 67th KenanHanke 821 78 3ms 20 Feb 2023 67th mnbvczx 🇰🇷 821 78 2ms 12 Mar 2023 1–75 of 227 Next Last