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 NFA Simulator 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 NFA Simulator 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 823rd Yax42 🇫🇷 852 92 420ms 4 Oct 2025 827th o0lit3 🇺🇸 851 54 8ms 22 Jun 2023 827th Natanaelel 🇸🇪 851 54 8ms 10 Feb 2025 829th Shanethegamer 🇺🇸 851 58 790ms 17 Sep 2025 830th Yewzir 🇧🇪 851 65 4ms 9 Oct 2023 830th MeWhenI 🇻🇦 851 65 3ms 10 Oct 2023 832nd mtirado1 850 74 73ms 24 Dec 2022 832nd Betuaredead 850 74 77ms 6 Jan 2023 832nd KatieLG 🇬🇧 850 74 78ms 15 Jan 2023 832nd bwat2 850 74 78ms 31 Mar 2023 832nd stackotter 850 74 77ms 29 May 2023 832nd ovs-code 🇩🇪 850 74 76ms 17 Apr 2024 832nd madeforlosers 850 74 76ms 21 Nov 2024 839th Shanethegamer 🇺🇸 850 99 27ms 27 Apr 2023 840th Grrisly 850 114 261ms 25 Mar 2024 841st SirBogman 🇺🇸 849 55 43ms 5 May 2022 841st olivermrose 🇺🇸 849 55 45ms 6 May 2022 841st 4hg 🇺🇸 849 55 46ms 24 Aug 2022 841st DialFrost 🇸🇬 849 55 50ms 1 Jan 2023 841st error256 849 55 43ms 4 May 2024 846th JayXon 🇺🇸 848 56 998ms 9 May 2022 847th DialFrost 🇸🇬 848 162 1,719ms 13 Sep 2025 847th emgordon154 848 162 1,676ms 17 Sep 2025 849th the-zammers 847 68 188ms 2 Oct 2023 850th MeWhenI 🇻🇦 846 26 201ms 25 Aug 2022 850th AlephSquirrel 846 26 141ms 6 Jan 2023 850th ovs-code 🇩🇪 846 26 524ms 5 May 2024 850th saito-ta 🇯🇵 846 26 139ms 12 Dec 2024 854th randolchance 846 63 10ms 8 Jan 2023 854th CatsAreFluffy 846 63 10ms 18 Feb 2023 854th amiralitaheri 846 63 10ms 23 Feb 2023 854th RuyiLi 846 63 10ms 1 Apr 2023 854th TaserTheFox 🇺🇸 846 63 10ms 25 May 2023 854th pfysches-boop 846 63 10ms 6 Aug 2023 854th mhgockel 846 63 10ms 19 Aug 2023 854th NickTheEASDude 🇺🇸 846 63 10ms 18 Jan 2024 854th 823126 846 63 11ms 14 Nov 2024 854th Palladium02 846 63 9ms 12 May 2025 854th 4very 846 63 10ms 10 Jun 2025 854th Ultra814 846 63 9ms 21 Aug 2025 866th Natanaelel 🇸🇪 845 57 462ms 17 Jan 2024 866th Kacarott 🇦🇺 845 57 566ms 10 Sep 2024 866th albanian-laundromat 845 57 471ms 7 Oct 2025 869th NewDefectus 🇮🇱 845 73 3ms 6 May 2022 869th inventshah 845 73 3ms 12 Jun 2022 869th Natanaelel 🇸🇪 845 73 2ms 15 Jun 2022 869th Herbert00709 🇵🇱 845 73 3ms 22 Dec 2023 869th LorenzoDeGaspari 845 73 3ms 27 May 2024 869th Bpc-CPU 845 73 2ms 12 Jul 2025 869th AZTECCO 845 73 3ms 16 Sep 2025 869th CaedenHarper 🇨🇦 845 73 3ms 28 Sep 2025 869th prestosilver 🇺🇸 845 73 3ms 2 hours ago 878th lynn 845 96 30ms 11 Jul 2023 879th Shanethegamer 🇺🇸 845 98 123ms 26 Oct 2022 879th emgordon154 845 98 122ms 18 Feb 2025 881st jared-hughes 845 100 51ms 20 Jul 2022 881st ZakkkkAttackkkk 🇵🇭 845 100 54ms 10 Aug 2022 881st Walter225 845 100 52ms 25 Jul 2023 884th retrohun 844 64 6ms 6 Nov 2022 884th Re-Adventures 🇮🇳 844 64 5ms 7 Nov 2022 884th stellartux 844 64 5ms 26 Dec 2023 884th bac0id 844 64 5ms 29 Jun 2024 884th snoozingnewt 🇺🇸 844 64 6ms 1 Sep 2024 884th albanian-laundromat 844 64 5ms 22 Sep 2025 890th janAkali 🇷🇺 844 77 118ms 12 Feb 2025 891st bschorno 843 92 314ms 12 Oct 2022 891st ChrisTheisen 843 92 315ms 14 Dec 2022 891st kellantech 843 92 312ms 4 Jul 2023 891st Mezzofloat 843 92 311ms 26 Aug 2023 891st Maximizer02 843 92 313ms 1 Oct 2023 891st madeforlosers 843 92 320ms 21 Nov 2024 891st ChromaChroma 843 92 330ms 7 Oct 2025 891st snoozingnewt 🇺🇸 843 92 335ms 8 Oct 2025 899th dokutan 843 93 428ms 27 Sep 2025 900th krcs 🇵🇱 842 53 246ms 9 May 2022 First Prev 826–900 of 3,483 Next Last