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 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 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 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 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 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 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 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 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 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 821st pfysches-boop 845 63 6 Aug 2023 821st mhgockel 845 63 19 Aug 2023 821st NickTheEASDude 🇺🇸 845 63 18 Jan 2024 821st 823126 845 63 14 Nov 2024 821st Palladium02 845 63 12 May 2025 821st 4very 845 63 24 days ago 821st gigaprofisi 🇺🇸 845 63 17 days ago 821st CaedenHarper 🇨🇦 845 63 5 days ago 834th NewDefectus 🇮🇱 844 73 6 May 2022 834th inventshah 844 73 12 Jun 2022 834th Natanaelel 🇸🇪 844 73 15 Jun 2022 834th Herbert00709 🇵🇱 844 73 22 Dec 2023 834th LorenzoDeGaspari 844 73 27 May 2024 839th jared-hughes 844 100 20 Jul 2022 839th ZakkkkAttackkkk 🇵🇭 844 100 10 Aug 2022 839th Walter225 844 100 25 Jul 2023 842nd Natanaelel 🇸🇪 843 57 17 Jan 2024 842nd Kacarott 🇦🇺 843 57 10 Sep 2024 844th retrohun 843 64 6 Nov 2022 844th Re-Adventures 🇮🇳 843 64 7 Nov 2022 844th stellartux 843 64 26 Dec 2023 844th bac0id 843 64 29 Jun 2024 844th snoozingnewt 🇺🇸 843 64 1 Sep 2024 849th DialFrost 🇸🇬 843 86 15 Dec 2024 850th Shanethegamer 🇺🇸 843 98 26 Oct 2022 850th emgordon154 843 98 18 Feb 2025 852nd janAkali 🇷🇺 842 77 12 Feb 2025 853rd bschorno 842 92 12 Oct 2022 853rd ChrisTheisen 842 92 14 Dec 2022 853rd kellantech 842 92 4 Jul 2023 853rd Mezzofloat 842 92 26 Aug 2023 853rd Maximizer02 842 92 1 Oct 2023 853rd michelebastione 🇮🇹 842 92 22 Dec 2023 853rd madeforlosers 842 92 21 Nov 2024 860th krcs 🇵🇱 841 53 9 May 2022 860th ryanlanegit 841 53 19 Jun 2022 860th sisyphus-ppcg 🇦🇺 841 53 15 Aug 2022 863rd DialFrost 🇸🇬 841 66 7 Apr 2025 864th Shanethegamer 🇺🇸 841 82 15 May 2023 865th lynn 841 96 11 Jul 2023 866th Smetalo 841 139 25 Aug 2022 866th ToxicP1e 841 139 2 Mar 2023 868th raszpi 🇭🇺 838 77 1 Sep 2023 869th error256 838 81 13 Sep 2024 870th Codsilla 🇨🇦 837 51 1 Jul 2022 871st frankgraziano 837 66 20 Apr 2025 872nd sean-niemann 🇺🇸 837 76 8 Oct 2024 873rd SirBogman 🇺🇸 836 89 4 May 2022 874th CatsAreFluffy 836 101 18 Feb 2023 874th annaproxy 836 101 9 May 2023 874th wojtekmal 836 101 15 Nov 2023 874th HumanoidCPU 836 101 6 May 2024 874th eMGeeneer 836 101 27 Jun 2024 874th bac0id 836 101 29 Jun 2024 880th eshilo-draper 835 75 6 Sep 2022 881st Andriamanitra 🇫🇮 835 83 17 Apr 2023 881st Natanaelel 🇸🇪 835 83 8 Jul 2023 883rd SirBogman 🇺🇸 834 36 5 May 2022 883rd HPWiz 🇳🇿 834 36 7 May 2022 883rd Natanaelel 🇸🇪 834 36 15 Jun 2022 883rd Steffan153 🇫🇮 834 36 18 Jan 2023 883rd codereport 🇨🇦 834 36 1 Jun 2024 883rd GolfinK 834 36 21 Nov 2024 883rd lifthrasiir 🇰🇷 834 36 1 Dec 2024 883rd GolfingSuccess 🇬🇷 834 36 20 Mar 2025 891st scpchicken 🇵🇼 834 55 4 May 2022 891st SirBogman 🇺🇸 834 55 5 May 2022 891st Shanethegamer 🇺🇸 834 55 19 May 2023 891st DialFrost 🇸🇬 834 55 14 Feb 2025 895th inverseLorentz 🇦🇺 834 69 3 Jun 2024 895th CLOStrophobic 🇮🇹 834 69 28 May 2025 897th ChiefChippy2 833 56 4 May 2022 897th aksyristos 833 56 29 Jan 2023 897th anter69 🇭🇺 833 56 12 Feb 2024 897th 3dm4n 🇫🇮 833 56 11 Mar 2024 Prev 826–900 of 3,148 Next