Card Number Validation in all languages in bytes. 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 Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript 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 APL 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 ><> ALGOL 68 ArkScript 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 APL 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 Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 720th mathisfun271 554 144 12ms 14 Oct 2024 720th bob-th 554 144 11ms 22 Oct 2024 723rd snoozingnewt 🇨🇦 554 148 138ms 20 Nov 2025 724th msbranicky 554 185 4ms 20 Jan 2025 725th MeWhenI 🇻🇦 554 290 8ms 2 Oct 2024 726th denkyuu1 553 102 350ms 10 days ago 727th mousetail 🇳🇱 553 128 2ms 3 Oct 2024 728th Matter1024 🇮🇳 551 149 437ms 22 Mar 2026 729th gpikmddk 550 130 489ms 30 Oct 2025 730th JunkIce 550 145 10ms 3 Dec 2024 730th cuvam 🇺🇸 550 145 10ms 3 days ago 732nd ethanlally 550 170 377ms 19 Nov 2025 732nd snoozingnewt 🇨🇦 550 170 485ms 5 Dec 2025 734th JDiLenarda 🇫🇷 549 165 1,474ms 1 Oct 2024 735th xyangst 549 171 182ms 1 Oct 2024 736th zakariamouhid 547 118 10ms 1 Oct 2024 737th kmathis22 547 171 350ms 19 Nov 2025 738th najs91 546 131 420ms 15 Oct 2024 738th bac0id 546 131 464ms 9 Jan 2025 738th CaedenHarper 🇨🇦 546 131 394ms 17 Oct 2025 741st croc54 546 146 11ms 15 Dec 2024 742nd PyryL 🇫🇮 543 147 11ms 1 Mar 2025 743rd eranws 542 119 11ms 23 Dec 2024 744th dokutan 540 107 953ms 12 Mar 2026 745th dokutan 540 131 2ms 10 Feb 2026 746th Sciman101 540 147 2ms 26 Mar 2025 747th mbittner20 539 148 10ms 13 Oct 2024 747th YAJUE114514 539 148 10ms 12 Dec 2025 749th msbranicky 536 175 161ms 13 Dec 2024 750th psaban 535 149 18ms 31 Jul 2025 750th TheZwierzLF 🇵🇱 535 149 11ms 24 Nov 2025 750th RodAlc24 🇪🇸 535 149 18ms 22 Feb 2026 753rd JRaspass 🇬🇧 534 74 3ms 24 Mar 2026 754th deancureton 533 121 11ms 30 Dec 2024 755th FlorianCassayre 🇫🇷 532 150 18ms 1 Oct 2024 755th jameswmccarty 532 150 11ms 5 Oct 2024 755th yousefalizadeh 532 150 11ms 23 Oct 2024 755th feherd 532 150 10ms 31 Oct 2024 755th kadamkaustubh 532 150 11ms 8 Nov 2025 760th msbranicky 531 126 2,349ms 9 Jan 2025 761st jusaka 531 176 402ms 6 days ago 762nd Protothor 529 122 11ms 10 Mar 2026 763rd adamnielson42 🇺🇸 525 152 10ms 6 Oct 2024 763rd voidgloom 525 152 11ms 22 Oct 2024 763rd omero-san 525 152 10ms 22 Sep 2025 763rd brochmann 🇸🇪 525 152 10ms 12 Oct 2025 767th Macweese 525 178 405ms 3 Aug 2025 768th isaiah0311 🇺🇸 524 135 2ms 9 Feb 2026 769th TheZwierzLF 🇵🇱 523 127 505ms 12 Dec 2025 770th galloj 🇨🇿 522 112 19ms 4 Oct 2024 771st snoozingnewt 🇨🇦 522 213 138ms 2 Nov 2025 772nd xyangst 521 153 10ms 1 Oct 2024 772nd denisfouchard 521 153 10ms 21 Aug 2025 774th bac0id 519 180 388ms 9 Jan 2025 775th osNiko 🇧🇷 518 154 11ms 21 Aug 2025 776th sidok 517 109 235ms 13 Nov 2024 777th dokutan 517 143 210ms 19 Oct 2024 778th Andrey2001 515 129 549ms 1 Feb 2026 779th robin-scragg 515 155 11ms 21 Aug 2025 779th celiendonze 🇨🇭 515 155 11ms 17 Oct 2025 781st nephila-nacrea 🇬🇧 513 77 4ms 2 Oct 2024 782nd KatieLG 🇬🇧 512 146 9ms 2 Oct 2024 783rd KatieLG 🇬🇧 511 140 419ms 1 Oct 2024 784th travisdoesmath 511 156 11ms 7 Sep 2025 784th Shotokhan 511 156 10ms 21 Sep 2025 786th yoshykai 511 183 374ms 12 Apr 2025 787th Chinay-Domitrix 🇺🇸 510 131 2,397ms 30 Mar 2025 788th dokutan 509 126 141ms 22 Jun 2025 789th lhulinsky 508 157 11ms 21 Oct 2024 790th msbranicky 506 138 3ms 3 Oct 2024 791st osNiko 🇧🇷 505 72 57ms 11 Jan 2026 792nd ellis-rix 505 158 11ms 9 Dec 2024 793rd snoozingnewt 🇨🇦 504 142 417ms 2 Nov 2025 794th blaztoma 🇱🇹 504 154 119ms 28 Nov 2025 795th jlangvand 502 141 1ms 15 Oct 2024 795th HumanoidCPU 502 141 1ms 7 Mar 2025 797th MeWhenI 🇻🇦 502 149 54ms 4 Oct 2024 798th webmiche 502 159 11ms 3 Nov 2025 799th Mabeloid 🇳🇴 499 133 572ms 2 Oct 2024 800th CheeseCake628 🇳🇴 499 160 108ms 5 Nov 2024 First Prev 721–800 of 1,007 Next Last