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 374th alasdair-greenland 922 58 10ms 13 Jan 2023 374th kirjavascript 922 58 11ms 4 Aug 2025 374th Posandu 922 58 13ms 26 Aug 2025 374th mrxz 🇳🇱 922 58 10ms 3 Sep 2025 380th MichalMarsalek 🇨🇿 922 71 122ms 5 May 2022 380th Lydxn 🇨🇦 922 71 126ms 7 May 2022 380th GrayJoKing 🇦🇺 922 71 129ms 8 May 2022 380th JayXon 🇺🇸 922 71 137ms 8 May 2022 380th Steffan153 🇫🇮 922 71 120ms 9 Mar 2023 380th Shanethegamer 🇺🇸 922 71 128ms 15 May 2023 380th MeWhenI 🇻🇦 922 71 121ms 8 Aug 2023 380th sean-niemann 🇺🇸 922 71 126ms 9 Jan 2025 388th Steffan153 🇫🇮 922 76 12ms 15 May 2023 388th primo-ppcg 🇹🇭 922 76 23ms 15 May 2023 388th Lydxn 🇨🇦 922 76 8ms 22 May 2023 388th GrayJoKing 🇦🇺 922 76 12ms 24 Aug 2023 392nd Herbert00709 🇵🇱 922 92 55ms 17 Nov 2023 392nd 4QT0R 922 92 62ms 23 Nov 2023 392nd ovs-code 🇩🇪 922 92 56ms 3 Jun 2024 395th xnor-gate 919 63 194ms 20 Jan 2025 396th Lydxn 🇨🇦 918 70 96ms 7 May 2022 396th JayXon 🇺🇸 918 70 96ms 7 May 2022 398th pardouin 🇫🇷 918 72 3,105ms 21 May 2025 399th primo-ppcg 🇹🇭 917 61 6ms 6 May 2022 399th sisyphus-ppcg 🇦🇺 917 61 9ms 14 Jul 2022 401st Steffan153 🇫🇮 917 71 107ms 14 Oct 2022 401st Shanethegamer 🇺🇸 917 71 106ms 15 Oct 2022 401st stefangimmillaro 917 71 106ms 16 Oct 2022 401st MeWhenI 🇻🇦 917 71 105ms 16 Oct 2022 401st Steffan153 🇫🇮 917 71 6ms 10 Dec 2022 401st synt7x 🇺🇸 917 71 4ms 7 Jul 2025 407th annaproxy 917 79 128ms 24 Aug 2022 407th GrayJoKing 🇦🇺 917 79 89ms 28 Aug 2022 407th JayXon 🇺🇸 917 79 784ms 5 Apr 2023 407th Lydxn 🇨🇦 917 79 810ms 9 Apr 2023 407th IanUtley 917 79 119ms 3 Nov 2023 407th Kacarott 🇦🇺 917 79 135ms 13 Jun 2024 413th Steffan153 🇫🇮 916 81 26ms 11 Dec 2023 414th arctouch-cristiannevianna 916 85 366ms 3 Apr 2023 414th tomtheisen 🇺🇸 916 85 340ms 10 Apr 2025 416th Shanethegamer 🇺🇸 916 87 390ms 15 May 2023 416th JayXon 🇺🇸 916 87 508ms 15 May 2023 416th Steffan153 🇫🇮 916 87 389ms 16 May 2023 416th Lydxn 🇨🇦 916 87 465ms 16 May 2023 416th GrayJoKing 🇦🇺 916 87 400ms 11 Aug 2023 416th sean-niemann 🇺🇸 916 87 458ms 11 Jul 2024 422nd Natanaelel 🇸🇪 915 57 474ms 17 Jan 2024 422nd Kacarott 🇦🇺 915 57 425ms 10 Sep 2024 424th Shanethegamer 🇺🇸 915 61 4ms 9 Oct 2023 424th edsrzf 🇳🇿 915 61 4ms 4 Jul 2025 426th ovs-code 🇩🇪 915 75 74ms 12 Sep 2024 426th Kacarott 🇦🇺 915 75 78ms 13 Sep 2024 428th Lydxn 🇨🇦 914 81 45ms 1 Apr 2023 429th lynn 913 78 1,358ms 5 May 2022 430th andersk 🇺🇸 913 91 120ms 25 Oct 2022 430th Super-Pizza 🇨🇦 913 91 127ms 4 Dec 2022 430th klixel 🇨🇦 913 91 121ms 20 May 2023 430th lynn 913 91 140ms 6 Jul 2024 430th edsrzf 🇳🇿 913 91 124ms 29 Nov 2024 430th DialFrost 🇸🇬 913 91 123ms 7 Apr 2025 436th TFeld00 🇩🇰 912 71 25ms 17 May 2022 436th DialFrost 🇸🇬 912 71 24ms 15 Nov 2022 436th StefanHabel 🇨🇦 912 71 19ms 29 Nov 2022 436th nstearns96 🇬🇧 912 71 18ms 11 Jan 2023 436th hallvabo 🇳🇴 912 71 19ms 7 Feb 2023 436th anter69 🇭🇺 912 71 18ms 21 May 2024 436th rucin93 🇵🇱 912 71 18ms 10 Jul 2024 436th lelbal 912 71 32ms 26 Aug 2025 436th HETHAT 🇩🇿 912 71 26ms 23 Sep 2025 445th tailorspy 912 93 53ms 27 May 2024 445th sean-niemann 🇺🇸 912 93 54ms 9 Jun 2025 445th KasperKivimaeki 🇫🇮 912 93 54ms 17 days ago 448th nai62 911 69 7ms 27 Aug 2022 449th GrayJoKing 🇦🇺 911 71 289ms 10 Aug 2023 450th GolfingSuccess 🇬🇷 910 64 86ms 14 Dec 2024 First Prev 376–450 of 3,452 Next Last