Card Number Validation 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 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 Chars Time Submitted 673rd wobblybits 471 137 17ms 17 Aug 2025 677th luca1339 471 198 302ms 4 Nov 2024 678th iczelia 🇩🇪 470 94 3ms 23 Sep 2025 679th ejini6969 468 102 35ms 14 Jun 2025 680th snoozingnewt 🇺🇸 465 200 230ms 20 days ago 681st scpchicken 🇵🇼 464 139 16ms 6 Oct 2024 682nd Jacob385 462 202 298ms 2 Oct 2024 683rd NanduBC 461 140 10ms 1 Oct 2024 683rd jmerle 🇳🇱 461 140 10ms 10 Jan 2025 683rd RobertHoeh 461 140 9ms 3 Mar 2025 683rd smilesformiles3 461 140 15ms 12 Jun 2025 683rd artem-aramma 461 140 16ms 18 Jun 2025 688th snoozingnewt 🇺🇸 460 96 2ms 21 days ago 689th Yewzir 🇧🇪 460 171 12ms 26 Dec 2024 690th madex 🇩🇪 459 104 36ms 2 Oct 2024 691st FranklinJiaChen 458 141 10ms 2 Oct 2024 692nd brimstonetrader 455 142 10ms 17 Oct 2024 692nd codewrite 🇬🇧 455 142 13ms 5 May 2025 692nd RobGLambert 455 142 16ms 8 Jun 2025 692nd GodlyProgrammer1 455 142 17ms 23 hours ago 696th snoozingnewt 🇺🇸 454 149 5ms 20 days ago 697th snoozingnewt 🇺🇸 453 124 228ms 21 days ago 698th GeneralFabian 452 143 9ms 9 Dec 2024 698th CutSandstone 452 143 9ms 30 Jan 2025 698th kistlerf 🇨🇭 452 143 16ms 19 May 2025 701st dokutan 451 63 3ms 26 Nov 2024 702nd snoozingnewt 🇺🇸 451 176 2ms 21 days ago 703rd varhammer 🇷🇺 450 223 12ms 23 Feb 2025 704th IISResetMe 449 104 474ms 27 Mar 2025 705th hiichbindermax 448 144 15ms 2 Oct 2024 705th mathisfun271 448 144 9ms 14 Oct 2024 705th bob-th 448 144 10ms 22 Oct 2024 708th dokutan 445 109 10ms 19 Oct 2024 709th Flekay 🇩🇪 445 145 10ms 10 Jul 2025 710th grey0ut 444 105 415ms 11 Jan 2025 711th croc54 442 146 11ms 15 Dec 2024 712th MyXoToD 🇩🇪 441 146 9ms 26 May 2025 713th PyryL 🇫🇮 439 147 10ms 1 Mar 2025 714th mbittner20 436 148 9ms 13 Oct 2024 715th psaban 433 149 16ms 31 Jul 2025 716th KatieLG 🇬🇧 433 183 2ms 2 Oct 2025 717th dokutan 432 130 271ms 17 Oct 2024 718th Mabeloid 🇳🇴 432 133 549ms 2 Oct 2024 719th KatieLG 🇬🇧 431 108 7ms 13 Oct 2024 720th snoozingnewt 🇺🇸 430 111 36ms 20 days ago 721st jameswmccarty 430 150 9ms 5 Oct 2024 721st yousefalizadeh 430 150 10ms 23 Oct 2024 721st feherd 430 150 12ms 31 Oct 2024 721st TheZwierzLF 🇵🇱 430 150 10ms 17 May 2025 721st kadamkaustubh 430 150 9ms 15 days ago 726th snoozingnewt 🇺🇸 426 268 28ms 20 days ago 727th adamnielson42 🇺🇸 425 152 9ms 6 Oct 2024 727th voidgloom 425 152 10ms 22 Oct 2024 727th omero-san 425 152 9ms 22 Sep 2025 727th brochmann 🇸🇪 425 152 10ms 12 Oct 2025 731st MeWhenI 🇻🇦 424 143 6ms 2 Oct 2024 732nd denisfouchard 422 153 11ms 21 Aug 2025 733rd osNiko 🇧🇷 419 154 22ms 21 Aug 2025 734th FortuiteMan 🇫🇷 417 155 16ms 16 Oct 2024 734th celiendonze 🇨🇭 417 155 11ms 17 Oct 2025 736th Arkadios200 417 196 95ms 21 Oct 2025 737th Shotokhan 414 156 9ms 21 Sep 2025 738th lhulinsky 411 157 10ms 21 Oct 2024 739th TheZwierzLF 🇵🇱 410 140 507ms 32 hours ago 740th ThatAlo 409 158 10ms 9 Dec 2024 741st aksyristos 409 172 2ms 7 hours ago 742nd webmiche 406 159 10ms 20 days ago 743rd dieggsy 406 247 21ms 10 Oct 2024 744th Mabeloid 🇳🇴 405 159 10ms 12 Oct 2024 745th CheeseCake628 🇳🇴 404 160 99ms 5 Nov 2024 746th snoozingnewt 🇺🇸 404 223 83ms 21 days ago 747th pres-abhisheksinha 401 161 9ms 8 Oct 2024 748th ibixina 399 162 10ms 13 Oct 2024 748th TheAtrossian 399 162 10ms 5 Jan 2025 750th Ralac07 🇦🇺 397 162 10ms 3 Oct 2024 First Prev 676–750 of 822 Next Last