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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 451st MeWhenI 🇻🇦 669 174 39ms 13 Feb 2025 452nd CaedenHarper 🇨🇦 666 140 336ms 3 Oct 2025 453rd emgordon154 665 111 4ms 12 Jan 2025 454th dbut2 🇦🇺 665 179 261ms 31 Oct 2024 455th rniii 664 106 2ms 2 Oct 2024 455th gastropner 664 106 2ms 11 Feb 2025 457th AlephSquirrel 664 146 4ms 14 May 2025 458th two-bad 🇬🇧 663 97 10ms 2 Oct 2024 458th LordSir101 663 97 8ms 10 Aug 2025 460th 4hg 🇺🇸 661 59 34ms 5 Oct 2024 461st snoozingnewt 🇺🇸 661 180 256ms 25 days ago 462nd DialFrost 🇸🇬 659 67 2ms 22 Dec 2024 463rd MeWhenI 🇻🇦 659 88 130ms 2 Oct 2024 463rd Shanethegamer 🇺🇸 659 88 132ms 5 Oct 2024 465th GolfingSuccess 🇬🇷 659 98 16ms 5 Oct 2024 465th firegene 🇮🇪 659 98 16ms 21 Oct 2024 465th JunkIce 659 98 10ms 3 Dec 2024 468th error256 657 142 159ms 31 May 2025 469th BambooleanLogic 🇸🇪 656 98 10ms 21 Oct 2024 470th jwhear 🇺🇸 655 197 1,691ms 1 Oct 2024 471st MeWhenI 🇻🇦 653 88 553ms 2 Oct 2024 472nd SirBogman 🇺🇸 652 99 16ms 8 Oct 2024 473rd voytxt 🇨🇿 651 89 132ms 17 Apr 2025 473rd dokutan 651 89 117ms 28 Jun 2025 475th dokutan 650 99 9ms 28 Jun 2025 476th w911 650 183 269ms 7 Oct 2024 477th rucin93 🇵🇱 648 144 151ms 28 Oct 2024 478th FlorianCassayre 🇫🇷 646 100 17ms 1 Oct 2024 478th bzijlema 🇳🇱 646 100 16ms 10 Oct 2024 478th bricknellj 646 100 16ms 4 Mar 2025 481st MeWhenI 🇻🇦 645 91 756ms 29 Aug 2025 482nd koipondx86 645 123 2ms 8 Nov 2024 483rd CaedenHarper 🇨🇦 643 100 9ms 22 Aug 2025 483rd iczelia 🇩🇪 643 100 9ms 11 Oct 2025 483rd Yax42 🇫🇷 643 100 18ms 29 hours ago 486th Shanethegamer 🇺🇸 643 124 6ms 4 Oct 2024 487th Apataras 643 145 302ms 25 Jun 2025 488th tomh1012 641 111 396ms 8 Sep 2025 489th stefangimmillaro 639 73 234ms 1 Oct 2024 490th btjones0 639 101 18ms 2 Dec 2024 491st Jonatan6 🇩🇰 639 110 2ms 24 Oct 2024 491st solisolu 639 110 2ms 3 days ago 493rd elgan65536 639 146 156ms 2 Oct 2024 493rd dokutan 639 146 328ms 4 days ago 493rd luuumine 🇫🇷 639 146 148ms 2 days ago 496th MeWhenI 🇻🇦 638 73 8ms 3 Oct 2024 497th annaproxy 633 102 16ms 1 Oct 2024 497th xyangst 633 102 10ms 1 Oct 2024 499th msbranicky 633 188 250ms 7 Jan 2025 500th dokutan 632 91 382ms 19 Oct 2024 501st Shanethegamer 🇺🇸 631 74 230ms 16 Oct 2024 502nd albanian-laundromat 631 264 541ms 25 days ago 503rd robin-scragg 627 103 13ms 21 Aug 2025 504th DialFrost 🇸🇬 627 304 152ms 13 Aug 2025 505th AlephSquirrel 625 40 48ms 1 Oct 2024 506th dokutan 624 127 2ms 10 Dec 2024 507th not-a-pokemon 622 113 2ms 23 Jul 2025 508th solisolu 621 104 10ms 13 days ago 509th codereport 🇨🇦 619 63 34ms 2 Oct 2024 510th BalaM314 619 104 8ms 4 Feb 2025 510th acollett89 619 104 9ms 15 Jul 2025 512th SirBogman 🇺🇸 618 93 521ms 23 Jul 2025 513th MarcMush 🇫🇷 617 91 737ms 8 Oct 2024 514th jupj 🇫🇮 617 114 2ms 20 Jul 2025 515th Ripick 617 135 335ms 23 Mar 2025 516th fourth-bit 615 105 16ms 1 Oct 2024 516th jared-hughes 615 105 16ms 3 Oct 2024 516th mattyhempstead 615 105 27ms 7 Oct 2024 519th olleicua 🇺🇸 612 78 36ms 18 Oct 2024 520th evnu 612 147 77ms 12 Oct 2025 521st davecame 609 106 16ms 1 Oct 2024 521st starfihs 609 106 10ms 2 Oct 2024 521st rschwa6308 🇺🇸 609 106 15ms 28 Oct 2024 521st snydej 609 106 19ms 21 Nov 2024 521st andrewjc2000 609 106 17ms 17 Jul 2025 First Prev 451–525 of 829 Next Last