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 Tower of Hanoi 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 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 Tower of Hanoi 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 Turtle Tutorial # Golfer Points Chars Time Submitted 675th snoozingnewt 🇺🇸 478 195 370ms 2 Nov 2025 677th mitzal 477 180 58ms 9 Feb 2025 678th sciencedjinn 475 136 9ms 8 Nov 2024 678th ihatethefrench 475 136 17ms 4 Jan 2025 680th MiffOttah 475 150 369ms 6 Oct 2024 681st kurkale6ka 471 137 21ms 16 Oct 2024 681st 4ndyJ 🇬🇧 471 137 10ms 14 Nov 2024 681st Mikey-Beep 🇬🇧 471 137 16ms 6 Aug 2025 681st wobblybits 471 137 17ms 17 Aug 2025 685th luca1339 471 198 302ms 4 Nov 2024 686th iczelia 🇩🇪 470 94 3ms 23 Sep 2025 687th ejini6969 468 102 35ms 14 Jun 2025 688th snoozingnewt 🇺🇸 466 200 230ms 2 Nov 2025 689th scpchicken 🇵🇼 465 139 16ms 6 Oct 2024 690th snoozingnewt 🇺🇸 464 121 206ms 4 days ago 691st Jacob385 462 202 298ms 2 Oct 2024 692nd NanduBC 461 140 10ms 1 Oct 2024 692nd jmerle 🇳🇱 461 140 10ms 10 Jan 2025 692nd RobertHoeh 461 140 9ms 3 Mar 2025 692nd smilesformiles3 461 140 15ms 12 Jun 2025 692nd artem-aramma 461 140 16ms 18 Jun 2025 692nd Andrey2001 461 140 17ms 4 days ago 698th snoozingnewt 🇺🇸 460 96 2ms 2 Nov 2025 699th madex 🇩🇪 459 104 36ms 2 Oct 2024 700th FranklinJiaChen 458 141 10ms 2 Oct 2024 701st brimstonetrader 455 142 10ms 17 Oct 2024 701st codewrite 🇬🇧 455 142 13ms 5 May 2025 701st RobGLambert 455 142 16ms 8 Jun 2025 701st GodlyProgrammer1 455 142 17ms 9 days ago 705th snoozingnewt 🇺🇸 454 149 5ms 2 Nov 2025 706th IISResetMe 453 103 460ms 4 days ago 707th GeneralFabian 452 143 9ms 9 Dec 2024 707th CutSandstone 452 143 9ms 30 Jan 2025 707th kistlerf 🇨🇭 452 143 16ms 19 May 2025 710th dokutan 451 63 3ms 26 Nov 2024 711th snoozingnewt 🇺🇸 451 176 2ms 2 Nov 2025 712th varhammer 🇷🇺 450 223 12ms 23 Feb 2025 713th TheZwierzLF 🇵🇱 449 128 453ms 7 days ago 714th hiichbindermax 448 144 15ms 2 Oct 2024 714th mathisfun271 448 144 9ms 14 Oct 2024 714th bob-th 448 144 10ms 22 Oct 2024 717th dokutan 445 109 10ms 19 Oct 2024 718th Flekay 🇩🇪 445 145 10ms 10 Jul 2025 719th grey0ut 444 105 415ms 11 Jan 2025 720th croc54 442 146 11ms 15 Dec 2024 721st MyXoToD 🇩🇪 441 146 9ms 26 May 2025 722nd Yewzir 🇧🇪 440 171 12ms 26 Dec 2024 723rd PyryL 🇫🇮 439 147 10ms 1 Mar 2025 724th mbittner20 436 148 9ms 13 Oct 2024 725th Andrey2001 435 132 1,530ms 4 days ago 726th psaban 433 149 16ms 31 Jul 2025 726th TheZwierzLF 🇵🇱 433 149 9ms 7 days ago 728th KatieLG 🇬🇧 433 183 2ms 2 Oct 2025 729th dokutan 432 130 271ms 17 Oct 2024 730th Mabeloid 🇳🇴 432 133 549ms 2 Oct 2024 731st KatieLG 🇬🇧 431 108 7ms 13 Oct 2024 732nd snoozingnewt 🇺🇸 430 111 36ms 2 Nov 2025 733rd jameswmccarty 430 150 9ms 5 Oct 2024 733rd yousefalizadeh 430 150 10ms 23 Oct 2024 733rd feherd 430 150 12ms 31 Oct 2024 733rd kadamkaustubh 430 150 9ms 24 days ago 737th snoozingnewt 🇺🇸 426 268 28ms 2 Nov 2025 738th adamnielson42 🇺🇸 425 152 9ms 6 Oct 2024 738th voidgloom 425 152 10ms 22 Oct 2024 738th omero-san 425 152 9ms 22 Sep 2025 738th brochmann 🇸🇪 425 152 10ms 12 Oct 2025 742nd MeWhenI 🇻🇦 424 143 6ms 2 Oct 2024 743rd denisfouchard 422 153 11ms 21 Aug 2025 744th osNiko 🇧🇷 419 154 22ms 21 Aug 2025 745th celiendonze 🇨🇭 417 155 11ms 17 Oct 2025 746th Arkadios200 417 196 95ms 21 Oct 2025 747th Shotokhan 414 156 9ms 21 Sep 2025 748th lhulinsky 411 157 10ms 21 Oct 2024 749th ThatAlo 409 158 10ms 9 Dec 2024 750th aksyristos 409 172 2ms 8 days ago First Prev 676–750 of 831 Next Last