Collatz in all languages in chars. 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 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 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 Chars Time Submitted 521st 1231234md5 🇨🇳 887 63 21ms 14 Dec 2023 521st f-tucker 887 63 35ms 6 Feb 2024 521st JunkIce 887 63 23ms 24 Nov 2024 521st Kowalskiexe 🇵🇱 887 63 20ms 19 Apr 2025 521st 123mjb 887 63 23ms 2 Jun 2025 521st DrakeSeteraO 887 63 53ms 13 days ago 532nd lynn 886 65 316ms 5 May 2022 532nd GrayJoKing 🇦🇺 886 65 327ms 5 May 2022 532nd Sakisan 🇧🇪 886 65 214ms 6 May 2022 532nd JayXon 🇺🇸 886 65 366ms 17 Oct 2022 532nd Steffan153 🇫🇮 886 65 172ms 12 Nov 2022 532nd tobeannouncd 886 65 331ms 25 Apr 2025 532nd sean-niemann 🇺🇸 886 65 174ms 9 Jun 2025 539th stefangimmillaro 886 71 89ms 2 Oct 2022 539th Steffan153 🇫🇮 886 71 95ms 23 Feb 2023 539th Shanethegamer 🇺🇸 886 71 89ms 16 May 2023 539th sean-niemann 🇺🇸 886 71 92ms 12 Jul 2024 543rd Shanethegamer 🇺🇸 886 72 90ms 8 May 2025 543rd edsrzf 🇳🇿 886 72 103ms 4 Jul 2025 545th RockOfStone 886 73 5ms 17 days ago 546th JayXon 🇺🇸 886 74 3,478ms 14 Nov 2024 547th canissimia 🇦🇶 886 110 3,068ms 20 Feb 2023 548th canissimia 🇦🇶 886 204 16ms 25 Nov 2023 549th Shanethegamer 🇺🇸 885 61 6ms 31 Oct 2022 549th MeWhenI 🇻🇦 885 61 5ms 4 Nov 2022 551st Steffan153 🇫🇮 884 52 7ms 31 Dec 2022 552nd DialFrost 🇸🇬 884 95 32ms 10 Dec 2024 553rd GrayJoKing 🇦🇺 883 77 76ms 13 Sep 2024 554th albanian-laundromat 883 94 490ms 24 Sep 2025 554th kmathis22 883 94 501ms 22 days ago 554th jkelly467 883 94 357ms 14 days ago 557th jared-hughes 883 130 23ms 15 Dec 2024 558th DialFrost 🇸🇬 882 76 91ms 17 Mar 2025 559th primo-ppcg 🇹🇭 882 85 43ms 14 Jan 2025 559th MeWhenI 🇻🇦 882 85 44ms 21 Apr 2025 561st SiestaGuru 882 88 325ms 9 Jan 2023 561st rifatx 882 88 312ms 5 Jul 2024 561st kmathis22 882 88 349ms 25 Sep 2025 564th stefangimmillaro 881 53 38ms 2 Oct 2022 564th Haksell 🇦🇶 881 53 40ms 22 Feb 2023 566th GrayJoKing 🇦🇺 881 70 2ms 6 May 2022 566th ovs-code 🇩🇪 881 70 2ms 8 Oct 2023 566th 09cf 881 70 13ms 8 Oct 2023 566th saito-ta 🇯🇵 881 70 3ms 21 Dec 2023 566th sean-niemann 🇺🇸 881 70 3ms 10 Jul 2024 566th KasperKivimaeki 🇫🇮 881 70 6ms 8 Aug 2025 572nd nipzu 881 94 124ms 17 May 2022 572nd Natanaelel 🇸🇪 881 94 121ms 17 Jun 2022 572nd nkoppel 881 94 121ms 19 Oct 2022 572nd ovs-code 🇩🇪 881 94 120ms 21 Jun 2023 572nd mousetail 🇳🇱 881 94 124ms 12 Jan 2024 577th m-tkach 🇺🇦 881 112 69ms 22 Jun 2025 578th sisyphus-ppcg 🇦🇺 880 40 362ms 31 Jan 2023 578th sean-niemann 🇺🇸 880 40 339ms 8 Mar 2025 580th primo-ppcg 🇹🇭 880 52 213ms 5 May 2022 580th dvargas46 🇺🇸 880 52 83ms 22 Dec 2022 582nd DialFrost 🇸🇬 880 56 1,411ms 1 Sep 2025 583rd ovs-code 🇩🇪 880 89 457ms 24 Jul 2024 583rd jipsong 🇩🇪 880 89 467ms 7 Apr 2025 585th Irratix 🇳🇱 880 96 53ms 4 May 2022 585th MeWhenI 🇻🇦 880 96 56ms 1 Jun 2022 585th janbehrens 🇩🇪 880 96 54ms 21 Apr 2023 585th Shanethegamer 🇺🇸 880 96 56ms 15 May 2023 585th Yewzir 🇧🇪 880 96 57ms 11 Nov 2023 585th MateuszPietrzak 🇵🇱 880 96 56ms 18 Nov 2023 585th kkoenig 880 96 55ms 21 Dec 2023 585th BlankSpruce 880 96 58ms 20 Aug 2024 585th fuzzylojik-golf 🇺🇸 880 96 63ms 14 Jun 2025 594th emplv 🇱🇻 880 110 263ms 5 May 2022 594th Shanethegamer 🇺🇸 880 110 253ms 21 Nov 2023 594th edsrzf 🇳🇿 880 110 301ms 28 Nov 2024 594th targrik 880 110 279ms 30 Jun 2025 598th ovs-code 🇩🇪 878 73 300ms 22 Jul 2023 599th Shanethegamer 🇺🇸 878 81 19ms 19 Dec 2023 599th emgordon154 878 81 26ms 29 Jul 2025 First Prev 526–600 of 3,405 Next Last