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 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 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 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 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 Trinomial Triangle Turtle Tutorial # Golfer Points Chars Time 820th madeforlosers 850 74 21 Nov 2024 827th MeWhenI 🇻🇦 850 92 10 Oct 2022 827th Betuaredead 850 92 5 Jan 2023 827th emgordon154 850 92 27 May 2025 830th SirBogman 🇺🇸 849 55 5 May 2022 830th olivermrose 🇺🇸 849 55 6 May 2022 830th 4hg 🇺🇸 849 55 24 Aug 2022 830th DialFrost 🇸🇬 849 55 1 Jan 2023 830th error256 849 55 4 May 2024 835th Shanethegamer 🇺🇸 849 99 27 Apr 2023 836th Re-Adventures 🇮🇳 849 116 16 Jul 2023 836th Yewzir 🇧🇪 849 116 7 Feb 2024 838th azka1368 848 138 23 Nov 2023 839th JayXon 🇺🇸 847 56 9 May 2022 840th MeWhenI 🇻🇦 846 26 25 Aug 2022 840th AlephSquirrel 846 26 6 Jan 2023 840th ovs-code 🇩🇪 846 26 5 May 2024 840th saito-ta 🇯🇵 846 26 12 Dec 2024 844th Shanethegamer 🇺🇸 846 58 7 days ago 845th randolchance 846 63 8 Jan 2023 845th CatsAreFluffy 846 63 18 Feb 2023 845th amiralitaheri 846 63 23 Feb 2023 845th RuyiLi 846 63 1 Apr 2023 845th TaserTheFox 🇺🇸 846 63 25 May 2023 845th pfysches-boop 846 63 6 Aug 2023 845th mhgockel 846 63 19 Aug 2023 845th NickTheEASDude 🇺🇸 846 63 18 Jan 2024 845th 823126 846 63 14 Nov 2024 845th Palladium02 846 63 12 May 2025 845th 4very 846 63 10 Jun 2025 845th gigaprofisi 🇺🇸 846 63 17 Jun 2025 845th Ultra814 846 63 21 Aug 2025 845th alexsave 846 63 7 days ago 859th the-zammers 846 68 2 Oct 2023 860th NewDefectus 🇮🇱 845 73 6 May 2022 860th inventshah 845 73 12 Jun 2022 860th Natanaelel 🇸🇪 845 73 15 Jun 2022 860th Herbert00709 🇵🇱 845 73 22 Dec 2023 860th LorenzoDeGaspari 845 73 27 May 2024 860th Bpc-CPU 845 73 12 Jul 2025 860th AZTECCO 845 73 7 days ago 867th jared-hughes 845 100 20 Jul 2022 867th ZakkkkAttackkkk 🇵🇭 845 100 10 Aug 2022 867th Walter225 845 100 25 Jul 2023 870th Natanaelel 🇸🇪 844 57 17 Jan 2024 870th Kacarott 🇦🇺 844 57 10 Sep 2024 872nd lynn 844 96 11 Jul 2023 873rd Shanethegamer 🇺🇸 844 98 26 Oct 2022 873rd emgordon154 844 98 18 Feb 2025 875th retrohun 843 64 6 Nov 2022 875th Re-Adventures 🇮🇳 843 64 7 Nov 2022 875th stellartux 843 64 26 Dec 2023 875th bac0id 843 64 29 Jun 2024 875th snoozingnewt 🇺🇸 843 64 1 Sep 2024 875th albanian-laundromat 843 64 39 hours ago 881st janAkali 🇷🇺 843 77 12 Feb 2025 882nd bschorno 843 92 12 Oct 2022 882nd ChrisTheisen 843 92 14 Dec 2022 882nd kellantech 843 92 4 Jul 2023 882nd Mezzofloat 843 92 26 Aug 2023 882nd Maximizer02 843 92 1 Oct 2023 882nd madeforlosers 843 92 21 Nov 2024 882nd kmathis22 843 92 19 days ago 889th DialFrost 🇸🇬 842 66 7 Apr 2025 890th SirBogman 🇺🇸 842 89 4 May 2022 891st Smetalo 842 139 25 Aug 2022 891st ToxicP1e 842 139 2 Mar 2023 893rd krcs 🇵🇱 841 53 9 May 2022 893rd ryanlanegit 841 53 19 Jun 2022 893rd sisyphus-ppcg 🇦🇺 841 53 15 Aug 2022 896th eshilo-draper 839 75 6 Sep 2022 896th kmathis22 839 75 18 days ago 898th raszpi 🇭🇺 839 77 1 Sep 2023 899th ovs-code 🇩🇪 839 161 9 days ago 900th frankgraziano 838 66 20 Apr 2025 Prev 826–900 of 3,310 Next