Collatz in all languages in chars. Achievements Cheevos Holes Languages Medals Miscellaneous 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 Tower of Hanoi 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 Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang 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 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 Erlang 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 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 Tower of Hanoi 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 Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 824th NickTheEASDude 🇺🇸 852 76 6ms 7 May 2024 824th koipondx86 852 76 7ms 8 Nov 2024 828th Shanethegamer 🇺🇸 852 83 1,354ms 4 May 2022 829th MeWhenI 🇻🇦 852 92 398ms 10 Oct 2022 829th Betuaredead 852 92 468ms 5 Jan 2023 829th Yax42 🇫🇷 852 92 420ms 4 Oct 2025 832nd o0lit3 🇺🇸 851 54 7ms 22 Jun 2023 832nd Natanaelel 🇸🇪 851 54 7ms 10 Feb 2025 834th Shanethegamer 🇺🇸 851 58 767ms 17 Sep 2025 835th Yewzir 🇧🇪 851 65 4ms 9 Oct 2023 835th MeWhenI 🇻🇦 851 65 3ms 10 Oct 2023 837th SirBogman 🇺🇸 850 55 38ms 5 May 2022 837th olivermrose 🇺🇸 850 55 38ms 6 May 2022 837th 4hg 🇺🇸 850 55 36ms 24 Aug 2022 837th DialFrost 🇸🇬 850 55 38ms 1 Jan 2023 837th error256 850 55 36ms 4 May 2024 842nd mtirado1 850 74 83ms 24 Dec 2022 842nd Betuaredead 850 74 81ms 6 Jan 2023 842nd KatieLG 🇬🇧 850 74 81ms 15 Jan 2023 842nd bwat2 850 74 84ms 31 Mar 2023 842nd stackotter 850 74 82ms 29 May 2023 842nd ovs-code 🇩🇪 850 74 82ms 17 Apr 2024 842nd madeforlosers 850 74 80ms 21 Nov 2024 849th Shanethegamer 🇺🇸 850 99 24ms 27 Apr 2023 850th albanian-laundromat 849 112 254ms 13 days ago 851st JayXon 🇺🇸 848 56 998ms 9 May 2022 852nd DialFrost 🇸🇬 848 162 1,753ms 13 Sep 2025 852nd emgordon154 848 162 1,669ms 17 Sep 2025 854th the-zammers 847 68 172ms 2 Oct 2023 855th MeWhenI 🇻🇦 846 26 153ms 25 Aug 2022 855th AlephSquirrel 846 26 146ms 6 Jan 2023 855th ovs-code 🇩🇪 846 26 352ms 5 May 2024 855th saito-ta 🇯🇵 846 26 160ms 12 Dec 2024 859th randolchance 846 63 11ms 8 Jan 2023 859th CatsAreFluffy 846 63 10ms 18 Feb 2023 859th amiralitaheri 846 63 10ms 23 Feb 2023 859th RuyiLi 846 63 9ms 1 Apr 2023 859th TaserTheFox 🇺🇸 846 63 10ms 25 May 2023 859th pfysches-boop 846 63 9ms 6 Aug 2023 859th mhgockel 846 63 10ms 19 Aug 2023 859th NickTheEASDude 🇺🇸 846 63 10ms 18 Jan 2024 859th 823126 846 63 14ms 14 Nov 2024 859th Palladium02 846 63 9ms 12 May 2025 859th 4very 846 63 10ms 10 Jun 2025 859th Ultra814 846 63 9ms 21 Aug 2025 871st NewDefectus 🇮🇱 846 73 3ms 6 May 2022 871st inventshah 846 73 2ms 12 Jun 2022 871st Natanaelel 🇸🇪 846 73 3ms 15 Jun 2022 871st Herbert00709 🇵🇱 846 73 2ms 22 Dec 2023 871st LorenzoDeGaspari 846 73 2ms 27 May 2024 871st Bpc-CPU 846 73 2ms 12 Jul 2025 871st AZTECCO 846 73 2ms 16 Sep 2025 871st CaedenHarper 🇨🇦 846 73 2ms 28 Sep 2025 871st prestosilver 🇺🇸 846 73 2ms 13 days ago 880th DialFrost 🇸🇬 846 87 42ms 41 hours ago 881st Natanaelel 🇸🇪 845 57 417ms 17 Jan 2024 881st Kacarott 🇦🇺 845 57 394ms 10 Sep 2024 881st albanian-laundromat 845 57 494ms 7 Oct 2025 884th retrohun 845 64 6ms 6 Nov 2022 884th Re-Adventures 🇮🇳 845 64 5ms 7 Nov 2022 884th stellartux 845 64 5ms 26 Dec 2023 884th bac0id 845 64 5ms 29 Jun 2024 884th snoozingnewt 🇨🇦 845 64 5ms 1 Sep 2024 884th albanian-laundromat 845 64 5ms 22 Sep 2025 890th lynn 845 96 29ms 11 Jul 2023 891st Shanethegamer 🇺🇸 845 98 119ms 26 Oct 2022 891st emgordon154 845 98 121ms 18 Feb 2025 893rd jared-hughes 845 100 69ms 20 Jul 2022 893rd ZakkkkAttackkkk 🇵🇭 845 100 71ms 10 Aug 2022 893rd Walter225 845 100 70ms 25 Jul 2023 896th janAkali 🇷🇺 844 77 123ms 12 Feb 2025 897th DialFrost 🇸🇬 843 66 189ms 7 Apr 2025 898th bschorno 843 92 366ms 12 Oct 2022 898th ChrisTheisen 843 92 339ms 14 Dec 2022 898th kellantech 843 92 363ms 4 Jul 2023 First Prev 826–900 of 3,500 Next Last