Card Number Validation 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 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 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 Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers 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 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 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 Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial # Golfer Points Bytes Time 524th solisolu 627 127 5 days ago 527th AlephSquirrel 625 40 1 Oct 2024 528th dokutan 622 127 10 Dec 2024 529th lelbal 622 128 2 Oct 2024 529th Lv0Sys 🇵🇱 622 128 15 Jun 2025 531st not-a-pokemon 620 113 23 Jul 2025 532nd DialFrost 🇸🇬 619 304 13 Aug 2025 533rd BalaM314 618 104 4 Feb 2025 533rd acollett89 618 104 15 Jul 2025 535th codereport 🇨🇦 617 63 2 Oct 2024 536th HumanoidCPU 617 107 17 Feb 2025 537th madex 🇩🇪 617 129 2 Oct 2024 537th RedzGoose 🇦🇺 617 129 15 Oct 2024 537th calebaitken 617 129 11 Apr 2025 540th MarcMush 🇫🇷 615 91 8 Oct 2024 541st jupj 🇫🇮 615 114 20 Jul 2025 542nd Ripick 615 135 23 Mar 2025 543rd Europe2048 612 130 2 Oct 2024 543rd nstearns96 🇬🇧 612 130 2 Oct 2024 543rd rollershutter 612 130 10 Jan 2025 543rd Stockoh 🇫🇷 612 130 4 Jul 2025 543rd luuumine 🇫🇷 612 130 2 days ago 548th bac0id 609 141 10 Jan 2025 549th inverseLorentz 🇦🇺 608 131 7 Oct 2024 549th dokutan 608 131 19 Oct 2024 549th sciencejiho 608 131 11 Feb 2025 549th Jaydosu 608 131 11 Apr 2025 549th snoozingnewt 🇺🇸 608 131 3 days ago 554th HumanoidCPU 607 106 7 Mar 2025 554th daveberlin 607 106 27 Jun 2025 556th MeWhenI 🇻🇦 607 111 2 Oct 2024 557th Seanharrs 606 117 15 Nov 2024 558th emgordon154 606 156 13 Dec 2024 559th kaascevich 604 134 9 Jul 2025 560th MeWhenI 🇻🇦 603 73 2 Oct 2024 561st Shanethegamer 🇺🇸 603 154 3 Oct 2024 562nd alemelis 602 93 1 Oct 2024 563rd roguh 🇬🇹 599 117 13 Oct 2024 563rd iczelia 🇩🇪 599 117 15 days ago 565th dokutan 598 117 3 Oct 2024 566th Mabeloid 🇳🇴 598 133 2 Oct 2024 566th Emutis 🇱🇹 598 133 4 Feb 2025 568th MeWhenI 🇻🇦 597 98 1 Oct 2024 569th dokutan 595 159 19 Oct 2024 570th SirBogman 🇺🇸 591 64 11 Jul 2025 571st arcpolaris 591 120 28 Jan 2025 572nd RaBa21 🇭🇺 590 135 19 Jul 2025 573rd tatzyr 🇯🇵 589 81 23 Dec 2024 574th bac0id 589 119 10 Jan 2025 575th DialFrost 🇸🇬 586 67 25 Jan 2025 576th gigaprofisi 🇺🇸 585 110 11 Aug 2025 577th sciencedjinn 585 136 8 Nov 2024 577th ihatethefrench 585 136 4 Jan 2025 579th dokutan 584 174 21 Feb 2025 580th h3ra993huskp 🇯🇵 583 159 25 Nov 2024 580th Schmitt-Very-Cool 583 159 13 days ago 582nd olleicua 🇺🇸 582 82 18 Oct 2024 583rd Trip-kun 581 136 5 Oct 2024 584th kurkale6ka 581 137 16 Oct 2024 584th 4ndyJ 🇬🇧 581 137 14 Nov 2024 584th Mikey-Beep 🇬🇧 581 137 6 Aug 2025 584th wobblybits 581 137 17 Aug 2025 588th michelebastione 🇮🇹 576 123 26 Aug 2025 589th 823126 574 112 13 Nov 2024 589th dokutan 574 112 22 Jun 2025 591st scpchicken 🇵🇼 573 139 6 Oct 2024 592nd KatieLG 🇬🇧 572 99 1 Oct 2024 593rd NanduBC 569 140 1 Oct 2024 593rd jmerle 🇳🇱 569 140 10 Jan 2025 593rd RobertHoeh 569 140 3 Mar 2025 593rd smilesformiles3 569 140 12 Jun 2025 593rd artem-aramma 569 140 18 Jun 2025 598th MeWhenI 🇻🇦 569 331 2 Oct 2024 599th MeWhenI 🇻🇦 567 164 6 Oct 2024 600th FranklinJiaChen 565 141 2 Oct 2024 First Prev 526–600 of 773 Next Last