Collatz in all languages in bytes. Cheevos Holes Recent Holes Langs Medals Misc 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 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 Tower of Hanoi Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 Erlang 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 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 Erlang 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 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 Tower of Hanoi Turtle Tutorial # Golfer Points Bytes Time Submitted 901st Grrisly 853 114 264ms 25 Mar 2024 902nd JRaspass 🇬🇧 852 46 344ms 4 May 2022 902nd Natanaelel 🇸🇪 852 46 322ms 4 May 2022 904th the-zammers 852 68 188ms 2 Oct 2023 905th Shanethegamer 🇺🇸 852 85 427ms 18 May 2022 905th GrayJoKing 🇦🇺 852 85 408ms 20 May 2022 907th retrohun 851 64 6ms 6 Nov 2022 907th Re-Adventures 🇮🇳 851 64 5ms 7 Nov 2022 907th stellartux 851 64 5ms 26 Dec 2023 907th bac0id 851 64 5ms 29 Jun 2024 907th snoozingnewt 🇺🇸 851 64 6ms 1 Sep 2024 907th albanian-laundromat 851 64 5ms 22 Sep 2025 913th lynn 851 96 30ms 11 Jul 2023 914th Schmitt-Very-Cool 851 98 336ms 26 Sep 2025 915th janAkali 🇷🇺 850 77 118ms 12 Feb 2025 916th krcs 🇵🇱 849 53 242ms 9 May 2022 916th ryanlanegit 849 53 287ms 19 Jun 2022 916th sisyphus-ppcg 🇦🇺 849 53 388ms 15 Aug 2022 919th randolchance 849 63 10ms 8 Jan 2023 919th CatsAreFluffy 849 63 10ms 18 Feb 2023 919th amiralitaheri 849 63 10ms 23 Feb 2023 919th RuyiLi 849 63 11ms 1 Apr 2023 919th TaserTheFox 🇺🇸 849 63 10ms 25 May 2023 919th pfysches-boop 849 63 13ms 6 Aug 2023 919th mhgockel 849 63 14ms 19 Aug 2023 919th NickTheEASDude 🇺🇸 849 63 10ms 18 Jan 2024 919th 823126 849 63 12ms 14 Nov 2024 919th Palladium02 849 63 12ms 12 May 2025 919th 4very 849 63 10ms 10 Jun 2025 919th Ultra814 849 63 10ms 21 Aug 2025 931st inventshah 849 74 4ms 4 May 2022 931st undersquire 849 74 3ms 24 Jun 2023 931st rdmsr 849 74 2ms 24 Jun 2023 931st Bmrl7 849 74 3ms 9 Jul 2023 931st Vinterion 849 74 3ms 6 Nov 2023 931st Herbert00709 🇵🇱 849 74 2ms 22 Dec 2023 937th DialFrost 🇸🇬 848 66 83ms 7 Apr 2025 938th SirBogman 🇺🇸 848 89 51ms 4 May 2022 939th Shanethegamer 🇺🇸 848 98 123ms 26 Oct 2022 939th emgordon154 848 98 122ms 18 Feb 2025 941st jared-hughes 848 100 57ms 20 Jul 2022 941st ZakkkkAttackkkk 🇵🇭 848 100 53ms 10 Aug 2022 941st Walter225 848 100 56ms 25 Jul 2023 944th AdamHe17 847 73 22ms 31 May 2022 944th AliceFord 847 73 21ms 2 Jun 2022 944th Natanaelel 🇸🇪 847 73 16ms 16 Jun 2022 944th btjones0 847 73 23ms 21 Jun 2022 944th marcin7Cd 847 73 19ms 27 Jun 2022 944th tri1212 🇻🇳 847 73 20ms 18 Jul 2022 944th vhoulbreque 🇫🇷 847 73 21ms 18 Aug 2022 944th KatieLG 🇬🇧 847 73 24ms 29 Aug 2022 944th tkr-sh 🇰🇵 847 73 21ms 8 Sep 2022 944th jroscoe5 847 73 21ms 15 Sep 2022 944th fredrik-bakke 🇳🇴 847 73 20ms 18 Sep 2022 944th firegene 🇮🇪 847 73 19ms 27 Sep 2022 944th OhmNomNom 847 73 24ms 7 Oct 2022 944th 0-4849 847 73 23ms 1 Nov 2022 944th M0PKOBKA 847 73 23ms 19 Dec 2022 944th calumacutt 847 73 26ms 19 Dec 2022 944th thehylian 847 73 27ms 2 Jan 2023 944th fynnkroeger 847 73 32ms 6 Jan 2023 944th shellbertt 🇨🇦 847 73 22ms 13 Jan 2023 944th hunt-g 847 73 22ms 4 Feb 2023 944th ljweel 847 73 20ms 13 Feb 2023 944th jmerle 🇳🇱 847 73 20ms 16 Feb 2023 944th TaserTheFox 🇺🇸 847 73 26ms 14 Mar 2023 944th pinguicula 847 73 20ms 6 Apr 2023 944th TheoKeller1 847 73 27ms 11 Jun 2023 944th fkantelberg 847 73 19ms 16 Jul 2023 944th Mikey-Beep 🇬🇧 847 73 20ms 31 Aug 2023 944th eiburns 847 73 23ms 9 Oct 2023 944th htareque 847 73 20ms 13 Oct 2023 944th wearsunscreen 847 73 21ms 18 Oct 2023 944th bzijlema 🇳🇱 847 73 20ms 25 Oct 2023 944th Grrisly 847 73 19ms 10 Nov 2023 First Prev 901–975 of 3,473 Next Last
