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 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 822nd LorenzoDeGaspari 845 73 27 May 2024 822nd Bpc-CPU 845 73 12 Jul 2025 822nd AZTECCO 845 73 20 days ago 822nd CaedenHarper 🇨🇦 845 73 8 days ago 830th lynn 845 96 11 Jul 2023 831st Shanethegamer 🇺🇸 845 98 26 Oct 2022 831st emgordon154 845 98 18 Feb 2025 833rd jared-hughes 845 100 20 Jul 2022 833rd ZakkkkAttackkkk 🇵🇭 845 100 10 Aug 2022 833rd Walter225 845 100 25 Jul 2023 836th Natanaelel 🇸🇪 844 57 17 Jan 2024 836th Kacarott 🇦🇺 844 57 10 Sep 2024 836th albanian-laundromat 844 57 107 mins ago 839th retrohun 844 64 6 Nov 2022 839th Re-Adventures 🇮🇳 844 64 7 Nov 2022 839th stellartux 844 64 26 Dec 2023 839th bac0id 844 64 29 Jun 2024 839th snoozingnewt 🇺🇸 844 64 1 Sep 2024 839th albanian-laundromat 844 64 14 days ago 845th janAkali 🇷🇺 843 77 12 Feb 2025 846th bschorno 843 92 12 Oct 2022 846th ChrisTheisen 843 92 14 Dec 2022 846th kellantech 843 92 4 Jul 2023 846th Mezzofloat 843 92 26 Aug 2023 846th Maximizer02 843 92 1 Oct 2023 846th madeforlosers 843 92 21 Nov 2024 852nd DialFrost 🇸🇬 842 66 7 Apr 2025 853rd SirBogman 🇺🇸 842 89 4 May 2022 854th dokutan 842 93 9 days ago 855th KatieLG 🇬🇧 842 115 25 Sep 2022 855th emgordon154 842 115 17 Jan 2025 857th ovs-code 🇩🇪 842 161 22 days ago 858th krcs 🇵🇱 841 53 9 May 2022 858th ryanlanegit 841 53 19 Jun 2022 858th sisyphus-ppcg 🇦🇺 841 53 15 Aug 2022 861st raszpi 🇭🇺 840 77 1 Sep 2023 862nd eshilo-draper 839 75 6 Sep 2022 862nd kmathis22 839 75 5 Sep 2025 864th sean-niemann 🇺🇸 839 76 8 Oct 2024 865th frankgraziano 838 66 20 Apr 2025 866th error256 838 81 13 Sep 2024 867th Codsilla 🇨🇦 837 51 1 Jul 2022 868th Andriamanitra 🇫🇮 837 83 17 Apr 2023 868th Natanaelel 🇸🇪 837 83 8 Jul 2023 870th Steffan153 🇫🇮 837 97 18 Jan 2023 871st CatsAreFluffy 837 101 18 Feb 2023 871st annaproxy 837 101 9 May 2023 871st wojtekmal 837 101 15 Nov 2023 871st HumanoidCPU 837 101 6 May 2024 871st eMGeeneer 837 101 27 Jun 2024 871st bac0id 837 101 29 Jun 2024 871st michaelmoynihan 837 101 3 Sep 2025 871st snoozingnewt 🇺🇸 837 101 8 hours ago 879th DialFrost 🇸🇬 837 162 23 days ago 879th emgordon154 837 162 20 days ago 881st ovs-code 🇩🇪 836 85 11 Dec 2023 882nd CLOStrophobic 🇮🇹 836 89 14 Feb 2025 883rd emplv 🇱🇻 836 124 31 Oct 2022 884th scpchicken 🇵🇼 835 55 4 May 2022 884th SirBogman 🇺🇸 835 55 5 May 2022 884th Shanethegamer 🇺🇸 835 55 19 May 2023 884th DialFrost 🇸🇬 835 55 14 Feb 2025 888th Yewzir 🇧🇪 835 69 24 Dec 2024 889th Re-Adventures 🇮🇳 835 116 16 Jul 2023 889th Yewzir 🇧🇪 835 116 7 Feb 2024 891st SirBogman 🇺🇸 834 36 5 May 2022 891st HPWiz 🇳🇿 834 36 7 May 2022 891st Natanaelel 🇸🇪 834 36 15 Jun 2022 891st Steffan153 🇫🇮 834 36 18 Jan 2023 891st codereport 🇨🇦 834 36 1 Jun 2024 891st GolfinK 834 36 21 Nov 2024 891st lifthrasiir 🇰🇷 834 36 1 Dec 2024 891st GolfingSuccess 🇬🇷 834 36 20 Mar 2025 899th ChiefChippy2 834 56 4 May 2022 899th aksyristos 834 56 29 Jan 2023 First Prev 826–900 of 3,360 Next Last