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 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 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 526th michael-pruglo 🇺🇦 902 94 54ms 5 Jul 2022 526th zygoloid 902 94 54ms 5 Aug 2024 528th SirBogman 🇺🇸 900 50 414ms 5 May 2022 528th nwellnhof 🇩🇪 900 50 429ms 3 Jun 2022 528th Lydxn 🇨🇦 900 50 415ms 15 Aug 2022 528th Steffan153 🇫🇮 900 50 448ms 9 Aug 2024 532nd Lydxn 🇨🇦 900 108 260ms 6 May 2022 532nd CaedenHarper 🇨🇦 900 108 256ms 5 Oct 2025 534th DialFrost 🇸🇬 899 69 94ms 15 Jul 2024 535th scpchicken 🇵🇼 899 72 18ms 4 May 2022 535th sultan 899 72 17ms 6 Jun 2022 535th annaproxy 899 72 21ms 22 Aug 2022 535th BlankSpruce 899 72 24ms 9 Sep 2022 535th ValentinCassayre 899 72 21ms 8 Oct 2022 535th commandblockguy 🇺🇸 899 72 19ms 3 Nov 2022 535th mathb0y512 899 72 21ms 1 Dec 2022 535th NoahBolohan 🇨🇦 899 72 21ms 28 Feb 2023 535th neel11235813 899 72 20ms 8 Mar 2023 535th Kacarott 🇦🇺 899 72 15ms 24 Mar 2023 535th Fracture17 899 72 20ms 8 Apr 2023 535th ayushdewan 899 72 25ms 7 May 2023 535th PeterTillema 🇳🇱 899 72 24ms 17 Oct 2023 535th Glinte 899 72 24ms 11 Dec 2023 535th nanatsu8 899 72 25ms 11 May 2024 535th thej10n 899 72 19ms 12 Jun 2024 535th duckyluuk 🇳🇱 899 72 20ms 13 Jun 2024 535th tobeannouncd 899 72 16ms 25 Apr 2025 535th YAJUE114514 899 72 16ms 15 Aug 2025 535th blaztoma 🇱🇹 899 72 22ms 26 Sep 2025 555th Lydxn 🇨🇦 898 48 285ms 5 May 2022 555th p-zubieta 898 48 249ms 6 Mar 2024 557th GrayJoKing 🇦🇺 898 70 2ms 6 May 2022 557th saito-ta 🇯🇵 898 70 3ms 21 Dec 2023 557th ovs-code 🇩🇪 898 70 2ms 17 Feb 2024 557th trinityy-7 898 70 2ms 7 Aug 2025 557th KasperKivimaeki 🇫🇮 898 70 6ms 8 Aug 2025 562nd Lydxn 🇨🇦 898 72 302ms 16 Jul 2023 563rd edsrzf 🇳🇿 898 78 12ms 26 Oct 2024 563rd kg583 🇺🇸 898 78 11ms 25 Sep 2025 565th GrayJoKing 🇦🇺 898 91 31ms 19 Jan 2023 566th DialFrost 🇸🇬 897 29 162ms 15 Mar 2025 567th Steffan153 🇫🇮 897 59 137ms 10 Aug 2024 567th rucin93 🇵🇱 897 59 136ms 13 Oct 2024 567th sean-niemann 🇺🇸 897 59 137ms 13 Oct 2024 567th lukegustafson 🇺🇸 897 59 135ms 24 Oct 2024 571st HPWiz 🇳🇿 896 34 13ms 31 hours ago 572nd Ripick 896 73 121ms 8 May 2023 573rd ovs-code 🇩🇪 896 89 457ms 24 Jul 2024 573rd jipsong 🇩🇪 896 89 467ms 7 Apr 2025 575th MichalMarsalek 🇨🇿 895 87 334ms 5 May 2022 575th Kloppermand 🇩🇰 895 87 343ms 7 Oct 2022 575th bwat2 895 87 321ms 6 Apr 2023 578th oeb25 894 93 152ms 16 May 2022 578th snobee 🇨🇦 894 93 155ms 8 Dec 2022 578th logvp 894 93 130ms 2 Jan 2024 578th elgan65536 894 93 124ms 5 Mar 2024 578th smartiel 894 93 120ms 12 Aug 2024 578th trist224 🇫🇷 894 93 126ms 12 Aug 2024 578th nullie 894 93 126ms 19 Dec 2024 578th lolgeny 894 93 128ms 22 Feb 2025 586th Shanethegamer 🇺🇸 893 61 6ms 31 Oct 2022 586th MeWhenI 🇻🇦 893 61 5ms 4 Nov 2022 588th JayXon 🇺🇸 893 74 3,078ms 14 Nov 2024 589th GolfingSuccess 🇬🇷 893 95 54ms 5 May 2022 589th Alex-x90 🇺🇸 893 95 56ms 4 Dec 2022 589th Mandrzejy 🇵🇱 893 95 57ms 22 Mar 2024 592nd m-tkach 🇺🇦 893 117 27ms 7 May 2022 592nd Lydxn 🇨🇦 893 117 28ms 7 May 2022 594th Steffan153 🇫🇮 892 52 7ms 31 Dec 2022 595th DialFrost 🇸🇬 892 56 820ms 1 Sep 2025 596th KatieLG 🇬🇧 892 60 13ms 4 May 2022 596th ScottHamper 892 60 10ms 5 May 2022 596th Re-Adventures 🇮🇳 892 60 10ms 5 May 2022 596th 0x24a537r9 892 60 10ms 29 Jul 2022 596th stefangabos 🇷🇴 892 60 10ms 19 Aug 2022 First Prev 526–600 of 3,464 Next Last