Card Number Validation in all languages in bytes. Cheevos Holes Recent Holes Langs Medals Misc 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 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 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 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 Erlang 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 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 Erlang 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 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 Tower of Hanoi Turtle Tutorial # Golfer Points Bytes Time Submitted 675th mossiegoat 514 155 10ms 21 Aug 2025 675th celiendonze 🇨🇭 514 155 19ms 17 Oct 2025 678th dokutan 512 143 128ms 19 Oct 2024 679th nephila-nacrea 🇬🇧 510 77 4ms 2 Oct 2024 680th travisdoesmath 510 156 10ms 7 Sep 2025 680th Shotokhan 510 156 11ms 21 Sep 2025 682nd KatieLG 🇬🇧 509 140 380ms 1 Oct 2024 683rd KatieLG 🇬🇧 509 146 9ms 2 Oct 2024 684th yoshykai 508 183 309ms 12 Apr 2025 685th dokutan 507 126 134ms 22 Jun 2025 686th Chinay-Domitrix 🇺🇸 507 131 3,429ms 30 Mar 2025 687th msbranicky 507 138 3ms 3 Oct 2024 688th lhulinsky 507 157 10ms 21 Oct 2024 689th dokutan 506 116 726ms 30 Aug 2025 690th ThatAlo 504 158 12ms 9 Dec 2024 691st ethanlally 503 185 326ms 4 hours ago 692nd snoozingnewt 🇺🇸 501 142 396ms 12 days ago 693rd webmiche 501 159 10ms 11 days ago 694th MeWhenI 🇻🇦 499 149 43ms 4 Oct 2024 695th janAkali 🇷🇺 499 167 335ms 8 Oct 2024 696th jlangvand 498 141 1ms 15 Oct 2024 696th HumanoidCPU 498 141 2ms 7 Mar 2025 698th CheeseCake628 🇳🇴 498 160 97ms 5 Nov 2024 699th Mabeloid 🇳🇴 497 133 549ms 2 Oct 2024 700th pres-abhisheksinha 495 161 11ms 8 Oct 2024 701st ibixina 492 162 9ms 13 Oct 2024 701st TheAtrossian 492 162 11ms 5 Jan 2025 703rd TheRealOhead 🇺🇸 491 131 13ms 1 Oct 2024 704th HumanoidCPU 491 145 427ms 5 Oct 2024 705th snoozingnewt 🇺🇸 488 150 135ms 12 days ago 706th snoozingnewt 🇺🇸 486 117 1,024ms 12 days ago 707th JunkIce 486 136 560ms 3 Dec 2024 708th h-hh-hhh 🇺🇦 485 177 60ms 2 Nov 2024 709th snoozingnewt 🇺🇸 484 168 105ms 12 days ago 710th Vaekor 483 165 12ms 15 Dec 2024 711th snoozingnewt 🇺🇸 483 249 27ms 12 days ago 712th snoozingnewt 🇺🇸 482 173 353ms 12 days ago 713th alphafalfa 480 92 2ms 8 Nov 2024 714th h-hh-hhh 🇺🇦 477 147 2ms 2 Nov 2024 715th mitzal 477 180 58ms 9 Feb 2025 716th ravnskjaer 🇩🇰 477 195 306ms 20 Dec 2024 716th snoozingnewt 🇺🇸 477 195 370ms 12 days ago 718th MiffOttah 475 150 402ms 6 Oct 2024 719th JesseNoEyes 🇺🇸 471 169 10ms 1 Oct 2024 720th Maximizer02 471 201 11ms 1 Oct 2024 721st iczelia 🇩🇪 470 94 3ms 23 Sep 2025 722nd luca1339 470 198 302ms 4 Nov 2024 723rd ejini6969 468 102 35ms 14 Jun 2025 724th zyc-2024 🇨🇳 468 170 10ms 5 Oct 2024 725th ComputerKWasTaken 🇺🇸 466 171 10ms 14 Oct 2024 726th snoozingnewt 🇺🇸 465 200 244ms 12 days ago 727th snoozingnewt 🇺🇸 460 96 3ms 12 days ago 728th Yewzir 🇧🇪 460 171 12ms 26 Dec 2024 729th navier-1 460 173 10ms 22 Sep 2025 730th Jacob385 460 202 298ms 2 Oct 2024 731st madex 🇩🇪 459 104 36ms 2 Oct 2024 732nd snoozingnewt 🇺🇸 454 149 4ms 12 days ago 733rd snoozingnewt 🇺🇸 453 124 213ms 12 days ago 734th clayboll99 452 176 14ms 10 Jul 2025 735th dokutan 451 63 2ms 26 Nov 2024 736th snoozingnewt 🇺🇸 451 176 2ms 12 days ago 737th Upload-and-View 🇺🇦 450 177 19ms 9 Aug 2025 738th varhammer 🇷🇺 450 223 12ms 23 Feb 2025 739th IISResetMe 449 104 494ms 27 Mar 2025 740th OSYCh314 🇦🇺 447 178 11ms 2 Nov 2024 741st dokutan 445 109 10ms 19 Oct 2024 742nd grey0ut 444 105 368ms 11 Jan 2025 743rd calum12345 442 180 11ms 26 Mar 2025 744th MyXoToD 🇩🇪 441 146 9ms 26 May 2025 745th CheeseCake628 🇳🇴 438 151 453ms 27 days ago 746th zt14427 438 182 11ms 27 Dec 2024 747th IoLimmer 435 183 16ms 10 Oct 2024 748th KatieLG 🇬🇧 433 183 2ms 2 Oct 2025 748th StronkCheese2 433 183 2ms 2 days ago 750th aksyristos 433 184 16ms 15 Nov 2024 First Prev 676–750 of 817 Next Last