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 Calendar 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 Multitap Input 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 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 Numbrix 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 ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily 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 ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily 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 Calendar 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 Multitap Input 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 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 Numbrix 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 400th ovs-code 🇩🇪 718 90 17ms 3 Oct 2024 400th luuumine 🇫🇷 718 90 17ms 8 Oct 2025 400th JOrE20 718 90 16ms 1 Dec 2025 400th Steffan153 🇫🇮 718 90 20ms 9 days ago 400th firegene 🇮🇪 718 90 16ms 31 hours ago 406th snyderek 🇺🇸 718 121 53ms 1 Oct 2024 407th ovs-code 🇩🇪 716 81 126ms 17 Apr 2025 408th JOrE20 715 90 10ms 9 days ago 409th Shanethegamer 🇺🇸 715 101 5ms 2 Oct 2024 410th ovs-code 🇩🇪 714 75 1,104ms 1 Oct 2024 411th rzv-me 713 95 5ms 5 Oct 2024 412th h3ra993huskp 🇯🇵 713 131 422ms 30 Nov 2025 413th CLOStrophobic 🇮🇹 712 160 40ms 27 Feb 2025 414th 5cw 🇺🇸 710 91 16ms 1 Oct 2024 414th stefangimmillaro 710 91 16ms 13 Oct 2024 414th dokutan 710 91 10ms 19 Oct 2024 414th GrayJoKing 🇦🇺 710 91 19ms 2 Jul 2025 418th Natanaelel 🇸🇪 709 55 34ms 1 Mar 2025 419th DialFrost 🇸🇬 709 106 12ms 13 Dec 2024 420th GrayJoKing 🇦🇺 707 82 134ms 1 Oct 2024 421st DialFrost 🇸🇬 707 132 224ms 8 Apr 2025 422nd Shanethegamer 🇺🇸 706 118 357ms 2 Oct 2024 423rd BlankSpruce 706 123 402ms 1 Oct 2024 424th cbrt-x 706 157 139ms 1 Oct 2024 425th edsrzf 🇳🇿 705 76 1,005ms 1 Oct 2024 426th MeWhenI 🇻🇦 704 115 453ms 5 Oct 2024 427th Shanethegamer 🇺🇸 704 156 30ms 2 Oct 2024 428th janlelis 703 68 39ms 1 Oct 2024 428th tatzyr 🇯🇵 703 68 38ms 23 Dec 2024 430th emgordon154 702 76 5ms 7 Jun 2025 431st Shanethegamer 🇺🇸 702 92 16ms 3 Oct 2024 431st error256 702 92 21ms 7 Oct 2024 431st thatbirdguythatuknownot 702 92 18ms 14 Oct 2024 434th Alex-x90 🇺🇸 701 124 398ms 1 Oct 2024 434th Herbert00709 🇵🇱 701 124 56ms 14 Jun 2025 436th mousetail 🇳🇱 701 133 149ms 3 Oct 2024 437th LukeBridges 🇬🇧 700 92 11ms 3 Oct 2024 438th tobeannouncd 697 159 146ms 13 Dec 2024 439th emgordon154 696 134 216ms 25 Feb 2025 440th Bulmenisaurus 695 93 17ms 6 Oct 2024 440th lynn 695 93 16ms 8 Jan 2025 440th RaBa21 🇭🇺 695 93 17ms 19 Jul 2025 440th KasperKivimaeki 🇫🇮 695 93 17ms 30 Nov 2025 440th blaztoma 🇱🇹 695 93 18ms 18 Dec 2025 445th Shanethegamer 🇺🇸 693 41 3ms 4 Oct 2024 446th Shanethegamer 🇺🇸 693 83 445ms 5 Oct 2024 447th xyangst 692 93 16ms 1 Oct 2024 447th Salutations45 692 93 10ms 17 Nov 2024 447th strattonwhisler 692 93 10ms 26 Mar 2025 450th pardouin 🇫🇷 691 57 4ms 3 Oct 2024 451st NickTheEASDude 🇺🇸 690 115 3ms 17 Dec 2024 452nd Alex-x90 🇺🇸 688 100 2ms 1 Oct 2024 453rd DialFrost 🇸🇬 687 94 18ms 1 Oct 2024 454th dokutan 687 116 6ms 19 Oct 2024 455th MeWhenI 🇻🇦 686 68 285ms 2 Oct 2024 456th XenThe 🇬🇧 685 94 10ms 7 Jul 2025 457th ovs-code 🇩🇪 684 84 458ms 3 Oct 2024 458th aDwarfNamedUrist 684 162 138ms 1 Sep 2025 459th KatieLG 🇬🇧 683 70 36ms 2 Oct 2025 460th MeWhenI 🇻🇦 681 108 141ms 2 Oct 2024 461st the-zammers 680 163 149ms 1 Dec 2024 462nd tailorspy 679 128 403ms 4 Oct 2024 463rd GrayJoKing 🇦🇺 678 79 1,204ms 1 Oct 2024 464th snoozingnewt 🇨🇦 676 95 79ms 23 Oct 2025 465th edsrzf 🇳🇿 674 99 2,281ms 5 Jul 2025 465th jkelly467 674 99 2,384ms 22 Jan 2026 467th Yax42 🇫🇷 674 129 70ms 8 Jan 2026 467th emgordon154 674 129 55ms 12 days ago 469th MeWhenI 🇻🇦 673 96 17ms 30 Jul 2025 470th jerrandolph 673 177 303ms 25 Sep 2025 470th CaedenHarper 🇨🇦 673 177 292ms 17 Nov 2025 472nd HumanoidCPU 671 96 11ms 7 Mar 2025 473rd error256 671 101 5ms 24 Oct 2024 474th emgordon154 670 115 120ms 9 Dec 2025 475th Shanethegamer 🇺🇸 668 65 2ms 1 Oct 2024 476th madex 🇩🇪 668 103 1ms 2 Oct 2024 477th CaedenHarper 🇨🇦 667 140 571ms 3 Oct 2025 478th dbut2 🇦🇺 666 179 297ms 31 Oct 2024 479th two-bad 🇬🇧 664 97 11ms 2 Oct 2024 479th LordSir101 664 97 10ms 10 Aug 2025 First Prev 401–480 of 887 Next Last