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 825th Natanaelel 🇸🇪 851 54 8ms 10 Feb 2025 827th Shanethegamer 🇺🇸 851 58 790ms 17 Sep 2025 828th Yewzir 🇧🇪 851 65 4ms 9 Oct 2023 828th MeWhenI 🇻🇦 851 65 3ms 10 Oct 2023 830th mtirado1 850 74 73ms 24 Dec 2022 830th Betuaredead 850 74 77ms 6 Jan 2023 830th KatieLG 🇬🇧 850 74 78ms 15 Jan 2023 830th bwat2 850 74 78ms 31 Mar 2023 830th stackotter 850 74 77ms 29 May 2023 830th ovs-code 🇩🇪 850 74 76ms 17 Apr 2024 830th madeforlosers 850 74 76ms 21 Nov 2024 837th Shanethegamer 🇺🇸 850 99 27ms 27 Apr 2023 838th Grrisly 850 114 262ms 25 Mar 2024 838th albanian-laundromat 850 114 240ms 6 days ago 840th SirBogman 🇺🇸 849 55 43ms 5 May 2022 840th olivermrose 🇺🇸 849 55 45ms 6 May 2022 840th 4hg 🇺🇸 849 55 46ms 24 Aug 2022 840th DialFrost 🇸🇬 849 55 50ms 1 Jan 2023 840th error256 849 55 43ms 4 May 2024 845th JayXon 🇺🇸 848 56 998ms 9 May 2022 846th DialFrost 🇸🇬 848 162 1,719ms 13 Sep 2025 846th emgordon154 848 162 1,676ms 17 Sep 2025 848th the-zammers 847 68 188ms 2 Oct 2023 849th MeWhenI 🇻🇦 846 26 201ms 25 Aug 2022 849th AlephSquirrel 846 26 141ms 6 Jan 2023 849th ovs-code 🇩🇪 846 26 524ms 5 May 2024 849th saito-ta 🇯🇵 846 26 139ms 12 Dec 2024 853rd randolchance 846 63 10ms 8 Jan 2023 853rd CatsAreFluffy 846 63 10ms 18 Feb 2023 853rd amiralitaheri 846 63 10ms 23 Feb 2023 853rd RuyiLi 846 63 10ms 1 Apr 2023 853rd TaserTheFox 🇺🇸 846 63 10ms 25 May 2023 853rd pfysches-boop 846 63 10ms 6 Aug 2023 853rd mhgockel 846 63 10ms 19 Aug 2023 853rd NickTheEASDude 🇺🇸 846 63 10ms 18 Jan 2024 853rd 823126 846 63 11ms 14 Nov 2024 853rd Palladium02 846 63 9ms 12 May 2025 853rd 4very 846 63 10ms 10 Jun 2025 853rd Ultra814 846 63 9ms 21 Aug 2025 865th Natanaelel 🇸🇪 845 57 474ms 17 Jan 2024 865th Kacarott 🇦🇺 845 57 425ms 10 Sep 2024 865th albanian-laundromat 845 57 507ms 7 Oct 2025 868th NewDefectus 🇮🇱 845 73 3ms 6 May 2022 868th inventshah 845 73 3ms 12 Jun 2022 868th Natanaelel 🇸🇪 845 73 2ms 15 Jun 2022 868th Herbert00709 🇵🇱 845 73 3ms 22 Dec 2023 868th LorenzoDeGaspari 845 73 3ms 27 May 2024 868th Bpc-CPU 845 73 2ms 12 Jul 2025 868th AZTECCO 845 73 3ms 16 Sep 2025 868th CaedenHarper 🇨🇦 845 73 3ms 28 Sep 2025 876th lynn 845 96 30ms 11 Jul 2023 877th Shanethegamer 🇺🇸 845 98 123ms 26 Oct 2022 877th emgordon154 845 98 122ms 18 Feb 2025 879th jared-hughes 845 100 51ms 20 Jul 2022 879th ZakkkkAttackkkk 🇵🇭 845 100 54ms 10 Aug 2022 879th Walter225 845 100 52ms 25 Jul 2023 882nd retrohun 844 64 6ms 6 Nov 2022 882nd Re-Adventures 🇮🇳 844 64 5ms 7 Nov 2022 882nd stellartux 844 64 5ms 26 Dec 2023 882nd bac0id 844 64 5ms 29 Jun 2024 882nd snoozingnewt 🇺🇸 844 64 6ms 1 Sep 2024 882nd albanian-laundromat 844 64 5ms 22 Sep 2025 888th janAkali 🇷🇺 844 77 118ms 12 Feb 2025 889th bschorno 843 92 314ms 12 Oct 2022 889th ChrisTheisen 843 92 315ms 14 Dec 2022 889th kellantech 843 92 312ms 4 Jul 2023 889th Mezzofloat 843 92 311ms 26 Aug 2023 889th Maximizer02 843 92 313ms 1 Oct 2023 889th madeforlosers 843 92 320ms 21 Nov 2024 889th ChromaChroma 843 92 330ms 7 Oct 2025 889th snoozingnewt 🇺🇸 843 92 335ms 8 Oct 2025 897th dokutan 843 93 428ms 27 Sep 2025 898th krcs 🇵🇱 842 53 246ms 9 May 2022 898th ryanlanegit 842 53 243ms 19 Jun 2022 898th sisyphus-ppcg 🇦🇺 842 53 402ms 15 Aug 2022 First Prev 826–900 of 3,475 Next Last