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 822nd stackotter 850 74 77ms 29 May 2023 822nd ovs-code 🇩🇪 850 74 77ms 17 Apr 2024 822nd madeforlosers 850 74 76ms 21 Nov 2024 829th Shanethegamer 🇺🇸 850 99 27ms 27 Apr 2023 830th SirBogman 🇺🇸 849 55 43ms 5 May 2022 830th olivermrose 🇺🇸 849 55 45ms 6 May 2022 830th 4hg 🇺🇸 849 55 46ms 24 Aug 2022 830th DialFrost 🇸🇬 849 55 50ms 1 Jan 2023 830th error256 849 55 43ms 4 May 2024 835th Grrisly 849 114 262ms 25 Mar 2024 836th JayXon 🇺🇸 848 56 998ms 9 May 2022 837th DialFrost 🇸🇬 848 162 1,719ms 13 Sep 2025 837th emgordon154 848 162 1,676ms 17 Sep 2025 839th the-zammers 847 68 188ms 2 Oct 2023 840th MeWhenI 🇻🇦 846 26 201ms 25 Aug 2022 840th AlephSquirrel 846 26 141ms 6 Jan 2023 840th ovs-code 🇩🇪 846 26 524ms 5 May 2024 840th saito-ta 🇯🇵 846 26 139ms 12 Dec 2024 844th randolchance 846 63 10ms 8 Jan 2023 844th CatsAreFluffy 846 63 10ms 18 Feb 2023 844th amiralitaheri 846 63 10ms 23 Feb 2023 844th RuyiLi 846 63 10ms 1 Apr 2023 844th TaserTheFox 🇺🇸 846 63 11ms 25 May 2023 844th pfysches-boop 846 63 10ms 6 Aug 2023 844th mhgockel 846 63 10ms 19 Aug 2023 844th NickTheEASDude 🇺🇸 846 63 10ms 18 Jan 2024 844th 823126 846 63 11ms 14 Nov 2024 844th Palladium02 846 63 11ms 12 May 2025 844th 4very 846 63 10ms 10 Jun 2025 844th Ultra814 846 63 9ms 21 Aug 2025 856th Natanaelel 🇸🇪 845 57 474ms 17 Jan 2024 856th Kacarott 🇦🇺 845 57 425ms 10 Sep 2024 856th albanian-laundromat 845 57 507ms 7 Oct 2025 859th NewDefectus 🇮🇱 845 73 3ms 6 May 2022 859th inventshah 845 73 3ms 12 Jun 2022 859th Natanaelel 🇸🇪 845 73 2ms 15 Jun 2022 859th Herbert00709 🇵🇱 845 73 3ms 22 Dec 2023 859th LorenzoDeGaspari 845 73 3ms 27 May 2024 859th Bpc-CPU 845 73 2ms 12 Jul 2025 859th AZTECCO 845 73 3ms 16 Sep 2025 859th CaedenHarper 🇨🇦 845 73 3ms 28 Sep 2025 867th lynn 845 96 30ms 11 Jul 2023 868th Shanethegamer 🇺🇸 845 98 123ms 26 Oct 2022 868th emgordon154 845 98 122ms 18 Feb 2025 870th jared-hughes 845 100 51ms 20 Jul 2022 870th ZakkkkAttackkkk 🇵🇭 845 100 54ms 10 Aug 2022 870th Walter225 845 100 54ms 25 Jul 2023 873rd retrohun 844 64 6ms 6 Nov 2022 873rd Re-Adventures 🇮🇳 844 64 5ms 7 Nov 2022 873rd stellartux 844 64 5ms 26 Dec 2023 873rd bac0id 844 64 5ms 29 Jun 2024 873rd snoozingnewt 🇺🇸 844 64 6ms 1 Sep 2024 873rd albanian-laundromat 844 64 5ms 22 Sep 2025 879th janAkali 🇷🇺 844 77 118ms 12 Feb 2025 880th bschorno 843 92 314ms 12 Oct 2022 880th ChrisTheisen 843 92 315ms 14 Dec 2022 880th kellantech 843 92 312ms 4 Jul 2023 880th Mezzofloat 843 92 311ms 26 Aug 2023 880th Maximizer02 843 92 313ms 1 Oct 2023 880th madeforlosers 843 92 320ms 21 Nov 2024 880th ChromaChroma 843 92 330ms 7 Oct 2025 880th snoozingnewt 🇺🇸 843 92 335ms 8 Oct 2025 888th dokutan 843 93 428ms 27 Sep 2025 889th krcs 🇵🇱 842 53 246ms 9 May 2022 889th ryanlanegit 842 53 243ms 19 Jun 2022 889th sisyphus-ppcg 🇦🇺 842 53 403ms 15 Aug 2022 892nd DialFrost 🇸🇬 842 66 95ms 7 Apr 2025 893rd SirBogman 🇺🇸 842 89 51ms 4 May 2022 894th KatieLG 🇬🇧 842 115 290ms 25 Sep 2022 894th emgordon154 842 115 255ms 17 Jan 2025 896th error256 841 81 75ms 13 Sep 2024 897th CLOStrophobic 🇮🇹 841 89 40ms 14 Feb 2025 898th kmathis22 841 100 29ms 9 days ago 899th raszpi 🇭🇺 840 77 105ms 1 Sep 2023 900th eshilo-draper 839 75 82ms 6 Sep 2022 First Prev 826–900 of 3,460 Next Last