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Card Number Validation in all languages in chars. Achievements Cheevos Holes Languages Medals Miscellaneous 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 Taxicab 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 Erlang 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 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 Erlang 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 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 Taxicab Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Chars Time Submitted 675th ihatethefrench 475 136 17ms 4 Jan 2025 677th MiffOttah 475 150 369ms 6 Oct 2024 678th kurkale6ka 471 137 21ms 16 Oct 2024 678th 4ndyJ 🇬🇧 471 137 10ms 14 Nov 2024 678th Mikey-Beep 🇬🇧 471 137 16ms 6 Aug 2025 678th wobblybits 471 137 17ms 17 Aug 2025 682nd luca1339 471 198 302ms 4 Nov 2024 683rd iczelia 🇩🇪 470 94 3ms 23 Sep 2025 684th ejini6969 468 102 35ms 14 Jun 2025 685th snoozingnewt 🇺🇸 466 200 230ms 25 days ago 686th scpchicken 🇵🇼 465 139 16ms 6 Oct 2024 687th snoozingnewt 🇺🇸 464 121 206ms 40 hours ago 688th Jacob385 462 202 298ms 2 Oct 2024 689th NanduBC 461 140 10ms 1 Oct 2024 689th jmerle 🇳🇱 461 140 10ms 10 Jan 2025 689th RobertHoeh 461 140 9ms 3 Mar 2025 689th smilesformiles3 461 140 15ms 12 Jun 2025 689th artem-aramma 461 140 16ms 18 Jun 2025 689th Andrey2001 461 140 17ms 27 hours ago 695th snoozingnewt 🇺🇸 460 96 2ms 25 days ago 696th madex 🇩🇪 459 104 36ms 2 Oct 2024 697th FranklinJiaChen 458 141 10ms 2 Oct 2024 698th brimstonetrader 455 142 10ms 17 Oct 2024 698th codewrite 🇬🇧 455 142 13ms 5 May 2025 698th RobGLambert 455 142 16ms 8 Jun 2025 698th GodlyProgrammer1 455 142 17ms 5 days ago 702nd snoozingnewt 🇺🇸 454 149 5ms 25 days ago 703rd IISResetMe 453 103 460ms 34 hours ago 704th GeneralFabian 452 143 9ms 9 Dec 2024 704th CutSandstone 452 143 9ms 30 Jan 2025 704th kistlerf 🇨🇭 452 143 16ms 19 May 2025 707th dokutan 451 63 3ms 26 Nov 2024 708th snoozingnewt 🇺🇸 451 176 2ms 25 days ago 709th varhammer 🇷🇺 450 223 12ms 23 Feb 2025 710th TheZwierzLF 🇵🇱 449 128 453ms 3 days ago 711th hiichbindermax 448 144 15ms 2 Oct 2024 711th mathisfun271 448 144 9ms 14 Oct 2024 711th bob-th 448 144 10ms 22 Oct 2024 714th dokutan 445 109 10ms 19 Oct 2024 715th Flekay 🇩🇪 445 145 10ms 10 Jul 2025 716th grey0ut 444 105 415ms 11 Jan 2025 717th croc54 442 146 11ms 15 Dec 2024 718th MyXoToD 🇩🇪 441 146 9ms 26 May 2025 719th Yewzir 🇧🇪 440 171 12ms 26 Dec 2024 720th PyryL 🇫🇮 439 147 10ms 1 Mar 2025 721st mbittner20 436 148 9ms 13 Oct 2024 722nd Andrey2001 435 132 1,530ms 27 hours ago 723rd psaban 433 149 16ms 31 Jul 2025 723rd TheZwierzLF 🇵🇱 433 149 9ms 3 days ago 725th KatieLG 🇬🇧 433 183 2ms 2 Oct 2025 726th dokutan 432 130 271ms 17 Oct 2024 727th Mabeloid 🇳🇴 432 133 549ms 2 Oct 2024 728th KatieLG 🇬🇧 431 108 7ms 13 Oct 2024 729th snoozingnewt 🇺🇸 430 111 36ms 25 days ago 730th jameswmccarty 430 150 9ms 5 Oct 2024 730th yousefalizadeh 430 150 10ms 23 Oct 2024 730th feherd 430 150 12ms 31 Oct 2024 730th kadamkaustubh 430 150 9ms 20 days ago 734th snoozingnewt 🇺🇸 426 268 28ms 25 days ago 735th adamnielson42 🇺🇸 425 152 9ms 6 Oct 2024 735th voidgloom 425 152 10ms 22 Oct 2024 735th omero-san 425 152 9ms 22 Sep 2025 735th brochmann 🇸🇪 425 152 10ms 12 Oct 2025 739th MeWhenI 🇻🇦 424 143 6ms 2 Oct 2024 740th denisfouchard 422 153 11ms 21 Aug 2025 741st osNiko 🇧🇷 419 154 22ms 21 Aug 2025 742nd FortuiteMan 🇫🇷 417 155 16ms 16 Oct 2024 742nd celiendonze 🇨🇭 417 155 11ms 17 Oct 2025 744th Arkadios200 417 196 95ms 21 Oct 2025 745th Shotokhan 414 156 9ms 21 Sep 2025 746th lhulinsky 411 157 10ms 21 Oct 2024 747th ThatAlo 409 158 10ms 9 Dec 2024 748th aksyristos 409 172 2ms 5 days ago 749th webmiche 406 159 10ms 25 days ago 750th dieggsy 406 247 21ms 10 Oct 2024 First Prev 676–750 of 829 Next Last