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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Multitap Input 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four 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 Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 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 APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 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 APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily 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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Multitap Input 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four 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 Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 801st rucin93 🇵🇱 859 57 164ms 4 Aug 2024 801st dokutan 859 57 163ms 9 Aug 2024 803rd dokutan 859 79 10ms 27 Apr 2024 803rd SwordF-Official 🇺🇸 859 79 10ms 1 Feb 2026 805th MeWhenI 🇻🇦 859 81 8ms 23 May 2023 806th MeWhenI 🇻🇦 859 145 1,547ms 28 Mar 2025 807th JRaspass 🇬🇧 858 41 388ms 4 May 2022 807th SirBogman 🇺🇸 858 41 227ms 4 May 2022 807th Natanaelel 🇸🇪 858 41 358ms 4 May 2022 810th 5quiwyrm 858 52 329ms 4 Sep 2022 810th MeWhenI 🇻🇦 858 52 296ms 28 Jan 2023 810th Feniske 🇫🇷 858 52 314ms 7 Nov 2023 810th dcgjb 858 52 292ms 29 Jan 2024 810th JPRuskin 🇬🇧 858 52 305ms 7 Apr 2025 810th IISResetMe 858 52 322ms 7 Apr 2025 810th Ripick 858 52 270ms 1 Jun 2025 810th madex 🇩🇪 858 52 271ms 3 hours ago 818th jared-hughes 858 72 2ms 6 Jul 2022 818th Steffan153 🇫🇮 858 72 2ms 3 Jan 2023 818th MeWhenI 🇻🇦 858 72 2ms 7 May 2023 818th ListeriaM 858 72 2ms 22 Aug 2023 818th larcherMTT 858 72 2ms 5 Oct 2024 818th snyderek 🇺🇸 858 72 2ms 19 Feb 2025 818th 5quiwyrm 858 72 2ms 29 Jun 2025 818th TeodorDyakov 🇧🇬 858 72 3ms 8 Jul 2025 818th xiaoyiming123 858 72 2ms 12 Jul 2025 827th dokutan 857 82 22ms 1 Jul 2024 828th Liibe 857 97 477ms 25 Sep 2025 828th Schmitt-Very-Cool 857 97 434ms 26 Sep 2025 830th frankgraziano 857 198 108ms 14 Oct 2025 831st typeswitch-dev 🇵🇹 856 75 5ms 22 Jul 2023 832nd ovs-code 🇩🇪 856 83 57ms 1 Jul 2024 833rd 386asm 🇺🇸 856 86 40ms 9 Apr 2023 833rd DialFrost 🇸🇬 856 86 43ms 30 Dec 2025 835th nwellnhof 🇩🇪 856 111 301ms 4 May 2022 835th stefangimmillaro 856 111 313ms 26 Sep 2023 835th kkoenig 856 111 290ms 4 Jan 2024 838th Frowny 855 38 40ms 5 May 2022 838th stackofbears 855 38 42ms 14 Mar 2025 840th DialFrost 🇸🇬 855 50 266ms 24 Oct 2023 841st yeminghan2021 855 99 63ms 3 Feb 2025 842nd ovs-code 🇩🇪 855 161 1,719ms 14 Sep 2025 843rd Shanethegamer 🇺🇸 854 70 104ms 12 Dec 2022 843rd Alessandro-Balconi 🇮🇹 854 70 108ms 26 Dec 2022 843rd snoozingnewt 🇨🇦 854 70 223ms 22 Nov 2025 846th aditsu 854 77 2,303ms 23 Nov 2025 847th henrydukepickle 854 97 132ms 8 Jul 2025 848th eshilo-draper 853 91 361ms 4 Sep 2022 848th ericlangedijk 🇸🇮 853 91 369ms 23 May 2023 848th KatieLG 🇬🇧 853 91 377ms 30 Apr 2024 848th Mikey-Beep 🇬🇧 853 91 367ms 3 Sep 2024 852nd MeWhenI 🇻🇦 853 92 467ms 10 Oct 2022 852nd Betuaredead 853 92 480ms 5 Jan 2023 852nd Yax42 🇫🇷 853 92 470ms 4 Oct 2025 855th DialFrost 🇸🇬 852 56 1,180ms 1 Sep 2025 855th GolfingSuccess 🇬🇷 852 56 905ms 27 days ago 857th Yewzir 🇧🇪 852 65 4ms 9 Oct 2023 857th MeWhenI 🇻🇦 852 65 4ms 10 Oct 2023 859th Shanethegamer 🇺🇸 852 83 1,454ms 4 May 2022 860th o0lit3 🇺🇸 851 54 8ms 22 Jun 2023 860th Natanaelel 🇸🇪 851 54 7ms 10 Feb 2025 862nd SirBogman 🇺🇸 850 55 38ms 5 May 2022 862nd olivermrose 🇺🇸 850 55 42ms 6 May 2022 862nd 4hg 🇺🇸 850 55 50ms 24 Aug 2022 862nd DialFrost 🇸🇬 850 55 43ms 1 Jan 2023 862nd error256 850 55 40ms 4 May 2024 867th mtirado1 850 74 80ms 24 Dec 2022 867th Betuaredead 850 74 78ms 6 Jan 2023 867th KatieLG 🇬🇧 850 74 92ms 15 Jan 2023 867th bwat2 850 74 80ms 31 Mar 2023 867th stackotter 850 74 84ms 29 May 2023 867th ovs-code 🇩🇪 850 74 84ms 17 Apr 2024 867th madeforlosers 850 74 82ms 21 Nov 2024 874th Shanethegamer 🇺🇸 850 99 24ms 27 Apr 2023 875th JayXon 🇺🇸 848 56 1,287ms 9 May 2022 876th the-zammers 847 68 165ms 2 Oct 2023 877th DialFrost 🇸🇬 847 83 18ms 1 Jan 2026 878th lynn 847 96 29ms 11 Jul 2023 879th jared-hughes 847 100 58ms 20 Jul 2022 879th ZakkkkAttackkkk 🇵🇭 847 100 60ms 10 Aug 2022 First Prev 801–880 of 3,603 Next Last