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 Minesweeper 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 Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi 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 Minesweeper 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 Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Chars Time Submitted 820th madeforlosers 850 74 76ms 21 Nov 2024 827th Shanethegamer 🇺🇸 850 99 27ms 27 Apr 2023 828th SirBogman 🇺🇸 849 55 43ms 5 May 2022 828th olivermrose 🇺🇸 849 55 45ms 6 May 2022 828th 4hg 🇺🇸 849 55 46ms 24 Aug 2022 828th DialFrost 🇸🇬 849 55 50ms 1 Jan 2023 828th error256 849 55 43ms 4 May 2024 833rd Grrisly 849 114 262ms 25 Mar 2024 834th JayXon 🇺🇸 848 56 998ms 9 May 2022 835th DialFrost 🇸🇬 848 162 1,719ms 13 Sep 2025 835th emgordon154 848 162 1,676ms 17 Sep 2025 837th the-zammers 847 68 188ms 2 Oct 2023 838th MeWhenI 🇻🇦 846 26 201ms 25 Aug 2022 838th AlephSquirrel 846 26 141ms 6 Jan 2023 838th ovs-code 🇩🇪 846 26 524ms 5 May 2024 838th saito-ta 🇯🇵 846 26 139ms 12 Dec 2024 842nd randolchance 846 63 10ms 8 Jan 2023 842nd CatsAreFluffy 846 63 10ms 18 Feb 2023 842nd amiralitaheri 846 63 10ms 23 Feb 2023 842nd RuyiLi 846 63 10ms 1 Apr 2023 842nd TaserTheFox 🇺🇸 846 63 11ms 25 May 2023 842nd pfysches-boop 846 63 10ms 6 Aug 2023 842nd mhgockel 846 63 10ms 19 Aug 2023 842nd NickTheEASDude 🇺🇸 846 63 10ms 18 Jan 2024 842nd 823126 846 63 11ms 14 Nov 2024 842nd Palladium02 846 63 11ms 12 May 2025 842nd 4very 846 63 10ms 10 Jun 2025 842nd Ultra814 846 63 9ms 21 Aug 2025 854th Natanaelel 🇸🇪 845 57 474ms 17 Jan 2024 854th Kacarott 🇦🇺 845 57 425ms 10 Sep 2024 854th albanian-laundromat 845 57 507ms 7 Oct 2025 857th NewDefectus 🇮🇱 845 73 3ms 6 May 2022 857th inventshah 845 73 3ms 12 Jun 2022 857th Natanaelel 🇸🇪 845 73 2ms 15 Jun 2022 857th Herbert00709 🇵🇱 845 73 3ms 22 Dec 2023 857th LorenzoDeGaspari 845 73 3ms 27 May 2024 857th Bpc-CPU 845 73 2ms 12 Jul 2025 857th AZTECCO 845 73 3ms 16 Sep 2025 857th CaedenHarper 🇨🇦 845 73 3ms 28 Sep 2025 865th lynn 845 96 30ms 11 Jul 2023 866th Shanethegamer 🇺🇸 845 98 123ms 26 Oct 2022 866th emgordon154 845 98 122ms 18 Feb 2025 868th jared-hughes 845 100 51ms 20 Jul 2022 868th ZakkkkAttackkkk 🇵🇭 845 100 54ms 10 Aug 2022 868th Walter225 845 100 54ms 25 Jul 2023 871st retrohun 844 64 6ms 6 Nov 2022 871st Re-Adventures 🇮🇳 844 64 5ms 7 Nov 2022 871st stellartux 844 64 5ms 26 Dec 2023 871st bac0id 844 64 5ms 29 Jun 2024 871st snoozingnewt 🇺🇸 844 64 6ms 1 Sep 2024 871st albanian-laundromat 844 64 5ms 22 Sep 2025 877th janAkali 🇷🇺 844 77 118ms 12 Feb 2025 878th bschorno 843 92 314ms 12 Oct 2022 878th ChrisTheisen 843 92 315ms 14 Dec 2022 878th kellantech 843 92 312ms 4 Jul 2023 878th Mezzofloat 843 92 311ms 26 Aug 2023 878th Maximizer02 843 92 313ms 1 Oct 2023 878th madeforlosers 843 92 320ms 21 Nov 2024 878th ChromaChroma 843 92 330ms 7 Oct 2025 878th snoozingnewt 🇺🇸 843 92 335ms 8 Oct 2025 886th dokutan 843 93 428ms 27 Sep 2025 887th krcs 🇵🇱 842 53 246ms 9 May 2022 887th ryanlanegit 842 53 243ms 19 Jun 2022 887th sisyphus-ppcg 🇦🇺 842 53 403ms 15 Aug 2022 890th DialFrost 🇸🇬 842 66 95ms 7 Apr 2025 891st SirBogman 🇺🇸 842 89 51ms 4 May 2022 892nd KatieLG 🇬🇧 842 115 290ms 25 Sep 2022 892nd emgordon154 842 115 255ms 17 Jan 2025 894th error256 841 81 75ms 13 Sep 2024 895th CLOStrophobic 🇮🇹 841 89 40ms 14 Feb 2025 896th kmathis22 841 100 29ms 9 days ago 897th raszpi 🇭🇺 840 77 105ms 1 Sep 2023 898th eshilo-draper 839 75 82ms 6 Sep 2022 898th kmathis22 839 75 78ms 5 Sep 2025 900th sean-niemann 🇺🇸 839 76 107ms 8 Oct 2024 First Prev 826–900 of 3,457 Next Last