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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 826th Shanethegamer 🇺🇸 845 98 26 Oct 2022 826th emgordon154 845 98 18 Feb 2025 828th jared-hughes 845 100 20 Jul 2022 828th ZakkkkAttackkkk 🇵🇭 845 100 10 Aug 2022 828th Walter225 845 100 25 Jul 2023 831st Natanaelel 🇸🇪 844 57 17 Jan 2024 831st Kacarott 🇦🇺 844 57 10 Sep 2024 833rd retrohun 844 64 6 Nov 2022 833rd Re-Adventures 🇮🇳 844 64 7 Nov 2022 833rd stellartux 844 64 26 Dec 2023 833rd bac0id 844 64 29 Jun 2024 833rd snoozingnewt 🇺🇸 844 64 1 Sep 2024 833rd albanian-laundromat 844 64 8 days ago 839th janAkali 🇷🇺 843 77 12 Feb 2025 840th bschorno 843 92 12 Oct 2022 840th ChrisTheisen 843 92 14 Dec 2022 840th kellantech 843 92 4 Jul 2023 840th Mezzofloat 843 92 26 Aug 2023 840th Maximizer02 843 92 1 Oct 2023 840th madeforlosers 843 92 21 Nov 2024 846th DialFrost 🇸🇬 842 66 7 Apr 2025 847th SirBogman 🇺🇸 842 89 4 May 2022 848th ovs-code 🇩🇪 842 161 16 days ago 849th krcs 🇵🇱 841 53 9 May 2022 849th ryanlanegit 841 53 19 Jun 2022 849th sisyphus-ppcg 🇦🇺 841 53 15 Aug 2022 852nd dokutan 841 93 3 days ago 853rd eshilo-draper 839 75 6 Sep 2022 853rd kmathis22 839 75 25 days ago 855th sean-niemann 🇺🇸 839 76 8 Oct 2024 856th raszpi 🇭🇺 839 77 1 Sep 2023 857th frankgraziano 838 66 20 Apr 2025 858th error256 838 81 13 Sep 2024 859th Codsilla 🇨🇦 837 51 1 Jul 2022 860th Andriamanitra 🇫🇮 837 83 17 Apr 2023 860th Natanaelel 🇸🇪 837 83 8 Jul 2023 862nd Steffan153 🇫🇮 837 97 18 Jan 2023 863rd DialFrost 🇸🇬 837 162 16 days ago 863rd emgordon154 837 162 13 days ago 865th CLOStrophobic 🇮🇹 836 89 14 Feb 2025 866th CatsAreFluffy 836 101 18 Feb 2023 866th annaproxy 836 101 9 May 2023 866th wojtekmal 836 101 15 Nov 2023 866th HumanoidCPU 836 101 6 May 2024 866th eMGeeneer 836 101 27 Jun 2024 866th bac0id 836 101 29 Jun 2024 866th michaelmoynihan 836 101 26 days ago 873rd emplv 🇱🇻 836 124 31 Oct 2022 874th scpchicken 🇵🇼 835 55 4 May 2022 874th SirBogman 🇺🇸 835 55 5 May 2022 874th Shanethegamer 🇺🇸 835 55 19 May 2023 874th DialFrost 🇸🇬 835 55 14 Feb 2025 878th Yewzir 🇧🇪 835 69 24 Dec 2024 879th ovs-code 🇩🇪 835 85 11 Dec 2023 880th cduerm 835 118 11 days ago 881st SirBogman 🇺🇸 834 36 5 May 2022 881st HPWiz 🇳🇿 834 36 7 May 2022 881st Natanaelel 🇸🇪 834 36 15 Jun 2022 881st Steffan153 🇫🇮 834 36 18 Jan 2023 881st codereport 🇨🇦 834 36 1 Jun 2024 881st GolfinK 834 36 21 Nov 2024 881st lifthrasiir 🇰🇷 834 36 1 Dec 2024 881st GolfingSuccess 🇬🇷 834 36 20 Mar 2025 889th ChiefChippy2 834 56 4 May 2022 889th aksyristos 834 56 29 Jan 2023 889th anter69 🇭🇺 834 56 12 Feb 2024 889th 3dm4n 🇫🇮 834 56 11 Mar 2024 889th lgrandco 834 56 9 Oct 2024 889th tatzyr 🇯🇵 834 56 10 Dec 2024 895th moustave 834 67 7 Nov 2024 896th inverseLorentz 🇦🇺 834 69 3 Jun 2024 896th CLOStrophobic 🇮🇹 834 69 28 May 2025 898th Shanethegamer 🇺🇸 834 82 15 May 2023 899th dokutan 834 88 9 Jun 2024 900th p-vf 🇨🇭 834 93 24 Jun 2022 Prev 826–900 of 3,335 Next