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 Submitted 820th mhgockel 846 63 11ms 19 Aug 2023 820th NickTheEASDude 🇺🇸 846 63 11ms 18 Jan 2024 820th 823126 846 63 15ms 14 Nov 2024 820th Palladium02 846 63 9ms 12 May 2025 820th 4very 846 63 11ms 10 Jun 2025 820th gigaprofisi 🇺🇸 846 63 10ms 17 Jun 2025 820th Ultra814 846 63 11ms 21 Aug 2025 833rd Natanaelel 🇸🇪 845 57 474ms 17 Jan 2024 833rd Kacarott 🇦🇺 845 57 425ms 10 Sep 2024 833rd albanian-laundromat 845 57 507ms 16 days ago 836th NewDefectus 🇮🇱 845 73 3ms 6 May 2022 836th inventshah 845 73 3ms 12 Jun 2022 836th Natanaelel 🇸🇪 845 73 2ms 15 Jun 2022 836th Herbert00709 🇵🇱 845 73 3ms 22 Dec 2023 836th LorenzoDeGaspari 845 73 3ms 27 May 2024 836th Bpc-CPU 845 73 2ms 12 Jul 2025 836th AZTECCO 845 73 3ms 16 Sep 2025 836th CaedenHarper 🇨🇦 845 73 3ms 24 days ago 844th lynn 845 96 30ms 11 Jul 2023 845th Shanethegamer 🇺🇸 845 98 147ms 26 Oct 2022 845th emgordon154 845 98 132ms 18 Feb 2025 847th jared-hughes 845 100 64ms 20 Jul 2022 847th ZakkkkAttackkkk 🇵🇭 845 100 74ms 10 Aug 2022 847th Walter225 845 100 64ms 25 Jul 2023 850th retrohun 844 64 6ms 6 Nov 2022 850th Re-Adventures 🇮🇳 844 64 5ms 7 Nov 2022 850th stellartux 844 64 5ms 26 Dec 2023 850th bac0id 844 64 5ms 29 Jun 2024 850th snoozingnewt 🇺🇸 844 64 6ms 1 Sep 2024 850th albanian-laundromat 844 64 5ms 22 Sep 2025 856th janAkali 🇷🇺 843 77 147ms 12 Feb 2025 857th bschorno 843 92 337ms 12 Oct 2022 857th ChrisTheisen 843 92 374ms 14 Dec 2022 857th kellantech 843 92 333ms 4 Jul 2023 857th Mezzofloat 843 92 286ms 26 Aug 2023 857th Maximizer02 843 92 291ms 1 Oct 2023 857th madeforlosers 843 92 296ms 21 Nov 2024 857th ChromaChroma 843 92 342ms 15 days ago 857th snoozingnewt 🇺🇸 843 92 363ms 14 days ago 865th DialFrost 🇸🇬 842 66 95ms 7 Apr 2025 866th SirBogman 🇺🇸 842 89 51ms 4 May 2022 867th dokutan 842 93 428ms 26 days ago 868th KatieLG 🇬🇧 842 115 275ms 25 Sep 2022 868th emgordon154 842 115 256ms 17 Jan 2025 870th ovs-code 🇩🇪 842 161 1,871ms 14 Sep 2025 871st krcs 🇵🇱 841 53 242ms 9 May 2022 871st ryanlanegit 841 53 287ms 19 Jun 2022 871st sisyphus-ppcg 🇦🇺 841 53 388ms 15 Aug 2022 874th raszpi 🇭🇺 840 77 128ms 1 Sep 2023 875th error256 840 81 75ms 13 Sep 2024 876th eshilo-draper 839 75 104ms 6 Sep 2022 876th kmathis22 839 75 94ms 5 Sep 2025 878th sean-niemann 🇺🇸 839 76 107ms 8 Oct 2024 879th frankgraziano 838 66 5ms 20 Apr 2025 880th emplv 🇱🇻 838 124 27ms 31 Oct 2022 881st Codsilla 🇨🇦 837 51 263ms 1 Jul 2022 882nd Andriamanitra 🇫🇮 837 83 13ms 17 Apr 2023 882nd Natanaelel 🇸🇪 837 83 13ms 8 Jul 2023 884th Steffan153 🇫🇮 837 97 33ms 18 Jan 2023 885th CatsAreFluffy 837 101 65ms 18 Feb 2023 885th annaproxy 837 101 85ms 9 May 2023 885th wojtekmal 837 101 68ms 15 Nov 2023 885th HumanoidCPU 837 101 63ms 6 May 2024 885th eMGeeneer 837 101 410ms 27 Jun 2024 885th bac0id 837 101 65ms 29 Jun 2024 885th michaelmoynihan 837 101 374ms 3 Sep 2025 885th snoozingnewt 🇺🇸 837 101 390ms 16 days ago 893rd DialFrost 🇸🇬 837 162 1,829ms 13 Sep 2025 893rd emgordon154 837 162 1,897ms 17 Sep 2025 895th ovs-code 🇩🇪 836 85 17ms 11 Dec 2023 896th dokutan 836 88 49ms 9 Jun 2024 897th CLOStrophobic 🇮🇹 836 89 52ms 14 Feb 2025 898th scpchicken 🇵🇼 835 55 11ms 4 May 2022 898th SirBogman 🇺🇸 835 55 8ms 5 May 2022 898th Shanethegamer 🇺🇸 835 55 6ms 19 May 2023 First Prev 826–900 of 3,386 Next Last