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 Calendar Connect Four 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 Calendar Connect Four 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 676th KatieLG 🇬🇧 509 146 8ms 2 Oct 2024 677th dokutan 507 126 159ms 22 Jun 2025 678th Chinay-Domitrix 🇺🇸 507 131 4,630ms 30 Mar 2025 679th msbranicky 507 138 4ms 3 Oct 2024 680th lhulinsky 507 157 13ms 21 Oct 2024 681st yoshykai 507 183 347ms 12 Apr 2025 682nd dokutan 506 116 1,150ms 30 Aug 2025 683rd ThatAlo 504 158 12ms 9 Dec 2024 684th snoozingnewt 🇺🇸 501 142 420ms 2 hours ago 685th MeWhenI 🇻🇦 499 149 45ms 4 Oct 2024 686th janAkali 🇷🇺 499 167 335ms 8 Oct 2024 687th CheeseCake628 🇳🇴 498 160 98ms 5 Nov 2024 688th Mabeloid 🇳🇴 497 133 549ms 2 Oct 2024 689th jlangvand 497 141 1ms 15 Oct 2024 689th HumanoidCPU 497 141 2ms 7 Mar 2025 691st pres-abhisheksinha 495 161 11ms 8 Oct 2024 692nd TheRealOhead 🇺🇸 491 131 10ms 1 Oct 2024 693rd HumanoidCPU 491 145 427ms 5 Oct 2024 694th ibixina 491 162 11ms 13 Oct 2024 694th TheAtrossian 491 162 11ms 5 Jan 2025 696th snoozingnewt 🇺🇸 488 150 150ms 2 hours ago 697th snoozingnewt 🇺🇸 486 117 1,062ms 2 hours ago 698th JunkIce 486 136 560ms 3 Dec 2024 699th h-hh-hhh 🇺🇦 485 177 69ms 2 Nov 2024 700th snoozingnewt 🇺🇸 484 168 136ms 2 hours ago 701st Vaekor 483 165 12ms 15 Dec 2024 702nd snoozingnewt 🇺🇸 483 249 28ms 2 hours ago 703rd snoozingnewt 🇺🇸 482 173 353ms 2 hours ago 704th alphafalfa 480 92 2ms 8 Nov 2024 705th h-hh-hhh 🇺🇦 477 147 2ms 2 Nov 2024 706th mitzal 477 180 65ms 9 Feb 2025 707th ravnskjaer 🇩🇰 476 195 414ms 20 Dec 2024 707th snoozingnewt 🇺🇸 476 195 432ms 2 hours ago 709th MiffOttah 475 150 402ms 6 Oct 2024 710th JesseNoEyes 🇺🇸 471 169 13ms 1 Oct 2024 711th Maximizer02 471 201 11ms 1 Oct 2024 712th iczelia 🇩🇪 470 94 3ms 23 Sep 2025 713th luca1339 469 198 575ms 4 Nov 2024 714th ejini6969 468 102 35ms 14 Jun 2025 715th zyc-2024 🇨🇳 468 170 10ms 5 Oct 2024 716th ComputerKWasTaken 🇺🇸 466 171 11ms 14 Oct 2024 717th snoozingnewt 🇺🇸 465 200 219ms 2 hours ago 718th snoozingnewt 🇺🇸 460 96 3ms 2 hours ago 719th Yewzir 🇧🇪 460 171 15ms 26 Dec 2024 720th navier-1 460 173 10ms 22 Sep 2025 721st Jacob385 460 202 483ms 2 Oct 2024 722nd madex 🇩🇪 459 104 36ms 2 Oct 2024 723rd snoozingnewt 🇺🇸 454 149 4ms 2 hours ago 724th snoozingnewt 🇺🇸 453 124 213ms 2 hours ago 725th clayboll99 452 176 14ms 10 Jul 2025 726th dokutan 451 63 3ms 26 Nov 2024 727th snoozingnewt 🇺🇸 450 176 2ms 2 hours ago 728th Upload-and-View 🇺🇦 450 177 19ms 9 Aug 2025 729th varhammer 🇷🇺 450 223 12ms 23 Feb 2025 730th IISResetMe 449 104 494ms 27 Mar 2025 731st OSYCh314 🇦🇺 447 178 10ms 2 Nov 2024 732nd dokutan 445 109 10ms 19 Oct 2024 733rd grey0ut 444 105 368ms 11 Jan 2025 734th calum12345 442 180 11ms 26 Mar 2025 735th MyXoToD 🇩🇪 441 146 10ms 26 May 2025 736th CheeseCake628 🇳🇴 438 151 453ms 15 days ago 737th zt14427 437 182 11ms 27 Dec 2024 738th IoLimmer 435 183 16ms 10 Oct 2024 739th KatieLG 🇬🇧 433 183 2ms 2 Oct 2025 740th aksyristos 433 184 17ms 15 Nov 2024 741st KatieLG 🇬🇧 431 108 7ms 13 Oct 2024 742nd snoozingnewt 🇺🇸 430 111 36ms 2 hours ago 743rd estomagordo 🇳🇱 428 186 10ms 15 Jul 2025 744th snoozingnewt 🇺🇸 426 268 28ms 2 hours ago 745th dokutan 425 132 307ms 3 Oct 2024 746th MeWhenI 🇻🇦 421 143 7ms 2 Oct 2024 747th Arkadios200 415 196 120ms 13 days ago 748th dieggsy 406 247 21ms 10 Oct 2024 749th snoozingnewt 🇺🇸 406 313 119ms 2 hours ago 750th Mabeloid 🇳🇴 405 159 10ms 12 Oct 2024 First Prev 676–750 of 807 Next Last