The Continued Fractions hole will go live in approximately 2 days. Why not try and solve it ahead of time?
Collatz in all languages in bytes. 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 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 Apéry’s Constant Binary Lambda Calculus 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 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 ><> 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 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 Apéry’s Constant Binary Lambda Calculus 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 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 Bytes Time Submitted 401st nipzu 906 48 46ms 8 Sep 2024 402nd Lydxn 🇨🇦 906 64 181ms 1 Apr 2023 403rd Steffan153 🇫🇮 906 80 31ms 15 Nov 2022 403rd error256 906 80 121ms 8 Apr 2025 405th Shanethegamer 🇺🇸 906 82 18ms 19 Dec 2023 405th edsrzf 🇳🇿 906 82 18ms 6 Jan 2025 405th kg583 🇺🇸 906 82 19ms 4 days ago 408th krcs 🇵🇱 906 86 387ms 10 May 2022 408th billings7 🇬🇧 906 86 418ms 15 May 2022 408th revlayle 🇺🇸 906 86 416ms 7 Dec 2022 408th Widgitty 906 86 403ms 1 Sep 2023 408th albanian-laundromat 906 86 412ms 30 Sep 2025 413th piano-miles 906 92 425ms 46 hours ago 414th shinh 905 52 37ms 29 Jun 2022 415th Lydxn 🇨🇦 905 70 86ms 7 May 2022 416th MeWhenI 🇻🇦 905 71 96ms 20 Aug 2024 417th m-tkach 🇺🇦 904 72 116ms 16 Oct 2022 417th GrayJoKing 🇦🇺 904 72 113ms 22 Oct 2022 417th emplv 🇱🇻 904 72 107ms 27 Oct 2022 417th sean-niemann 🇺🇸 904 72 136ms 7 Mar 2025 421st Steffan153 🇫🇮 904 82 42ms 1 Apr 2023 421st sean-niemann 🇺🇸 904 82 42ms 12 Jul 2024 423rd stefangimmillaro 904 92 119ms 24 Oct 2023 423rd inverseLorentz 🇦🇺 904 92 127ms 27 May 2024 423rd sean-niemann 🇺🇸 904 92 138ms 8 Jun 2025 423rd ian-h-chamberlain 🇺🇸 904 92 131ms 23 Nov 2025 427th michael-pruglo 🇺🇦 903 94 64ms 5 Jul 2022 427th zygoloid 903 94 54ms 5 Aug 2024 427th AdrienHache 🇫🇷 903 94 61ms 27 Dec 2025 430th Lydxn 🇨🇦 902 69 6ms 12 Sep 2022 430th GrayJoKing 🇦🇺 902 69 7ms 12 Sep 2022 430th btnlq 902 69 7ms 24 Sep 2022 433rd albanian-laundromat 901 107 282ms 22 Dec 2025 434th SirBogman 🇺🇸 900 50 449ms 5 May 2022 434th nwellnhof 🇩🇪 900 50 423ms 3 Jun 2022 434th Lydxn 🇨🇦 900 50 437ms 15 Aug 2022 434th Steffan153 🇫🇮 900 50 501ms 9 Aug 2024 438th Steffan153 🇫🇮 900 67 112ms 18 Dec 2022 438th Lydxn 🇨🇦 900 67 116ms 4 Feb 2023 438th sean-niemann 🇺🇸 900 67 99ms 7 Mar 2025 441st Lydxn 🇨🇦 900 72 353ms 16 Jul 2023 442nd GrayJoKing 🇦🇺 899 70 2ms 6 May 2022 442nd saito-ta 🇯🇵 899 70 2ms 21 Dec 2023 442nd ovs-code 🇩🇪 899 70 2ms 17 Feb 2024 442nd trinityy-7 899 70 2ms 7 Aug 2025 442nd KasperKivimaeki 🇫🇮 899 70 6ms 8 Aug 2025 447th GrayJoKing 🇦🇺 899 91 30ms 19 Jan 2023 448th Lydxn 🇨🇦 898 48 257ms 5 May 2022 448th p-zubieta 898 48 299ms 6 Mar 2024 450th NickTheEASDude 🇺🇸 898 76 6ms 7 May 2024 450th edsrzf 🇳🇿 898 76 6ms 23 Dec 2025 450th Shanethegamer 🇺🇸 898 76 5ms 23 Dec 2025 450th jared-hughes 898 76 5ms 24 Dec 2025 450th Waffle3z 898 76 5ms 26 Dec 2025 450th Blendi-Goose 898 76 5ms 20 days ago 456th edsrzf 🇳🇿 898 78 12ms 26 Oct 2024 457th DialFrost 🇸🇬 897 29 160ms 15 Mar 2025 458th Steffan153 🇫🇮 897 59 143ms 10 Aug 2024 458th rucin93 🇵🇱 897 59 146ms 13 Oct 2024 458th sean-niemann 🇺🇸 897 59 130ms 13 Oct 2024 458th lukegustafson 🇺🇸 897 59 140ms 24 Oct 2024 462nd Ripick 897 73 122ms 8 May 2023 463rd ovs-code 🇩🇪 897 89 458ms 24 Jul 2024 463rd jipsong 🇩🇪 897 89 450ms 7 Apr 2025 463rd DialFrost 🇸🇬 897 89 485ms 24 Dec 2025 463rd dokutan 897 89 425ms 18 days ago 467th nwellnhof 🇩🇪 896 69 24ms 4 May 2022 467th m-tkach 🇺🇦 896 69 18ms 4 May 2022 467th GolfingSuccess 🇬🇷 896 69 17ms 5 May 2022 467th jared-hughes 896 69 17ms 5 May 2022 467th ovs-code 🇩🇪 896 69 23ms 5 May 2022 467th btnlq 896 69 17ms 5 May 2022 467th sisyphus-ppcg 🇦🇺 896 69 15ms 6 May 2022 467th lynn 896 69 18ms 22 Aug 2022 467th Steffan153 🇫🇮 896 69 18ms 15 Nov 2022 467th AlexanderFair 896 69 24ms 19 Jul 2023 467th pardouin 🇫🇷 896 69 18ms 11 Nov 2023 467th AlephSquirrel 896 69 476ms 30 Dec 2023 467th kg583 🇺🇸 896 69 25ms 28 Jan 2024 467th davecame 896 69 23ms 20 Aug 2024 First Prev 401–480 of 3,603 Next Last