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 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 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 nephila-nacrea 🇬🇧 510 77 4ms 2 Oct 2024 677th travisdoesmath 510 156 10ms 7 Sep 2025 677th Shotokhan 510 156 11ms 21 Sep 2025 679th KatieLG 🇬🇧 509 140 380ms 1 Oct 2024 680th KatieLG 🇬🇧 509 146 11ms 2 Oct 2024 681st dokutan 507 126 134ms 22 Jun 2025 682nd Chinay-Domitrix 🇺🇸 507 131 3,429ms 30 Mar 2025 683rd msbranicky 507 138 4ms 3 Oct 2024 684th lhulinsky 507 157 13ms 21 Oct 2024 685th yoshykai 507 183 309ms 12 Apr 2025 686th dokutan 506 116 726ms 30 Aug 2025 687th ThatAlo 504 158 12ms 9 Dec 2024 688th snoozingnewt 🇺🇸 501 142 409ms 6 days ago 689th webmiche 501 159 10ms 5 days ago 690th MeWhenI 🇻🇦 499 149 44ms 4 Oct 2024 691st janAkali 🇷🇺 499 167 335ms 8 Oct 2024 692nd jlangvand 498 141 1ms 15 Oct 2024 692nd HumanoidCPU 498 141 2ms 7 Mar 2025 694th CheeseCake628 🇳🇴 498 160 98ms 5 Nov 2024 695th Mabeloid 🇳🇴 497 133 549ms 2 Oct 2024 696th pres-abhisheksinha 495 161 11ms 8 Oct 2024 697th ibixina 492 162 11ms 13 Oct 2024 697th TheAtrossian 492 162 11ms 5 Jan 2025 699th TheRealOhead 🇺🇸 491 131 10ms 1 Oct 2024 700th HumanoidCPU 491 145 427ms 5 Oct 2024 701st snoozingnewt 🇺🇸 488 150 135ms 6 days ago 702nd snoozingnewt 🇺🇸 486 117 1,024ms 6 days ago 703rd JunkIce 486 136 560ms 3 Dec 2024 704th h-hh-hhh 🇺🇦 485 177 60ms 2 Nov 2024 705th snoozingnewt 🇺🇸 484 168 105ms 6 days ago 706th Vaekor 483 165 12ms 15 Dec 2024 707th snoozingnewt 🇺🇸 483 249 27ms 6 days ago 708th snoozingnewt 🇺🇸 482 173 353ms 6 days ago 709th alphafalfa 480 92 2ms 8 Nov 2024 710th h-hh-hhh 🇺🇦 477 147 2ms 2 Nov 2024 711th mitzal 477 180 61ms 9 Feb 2025 712th ravnskjaer 🇩🇰 476 195 306ms 20 Dec 2024 712th snoozingnewt 🇺🇸 476 195 370ms 6 days ago 714th MiffOttah 475 150 402ms 6 Oct 2024 715th JesseNoEyes 🇺🇸 471 169 13ms 1 Oct 2024 716th Maximizer02 471 201 11ms 1 Oct 2024 717th iczelia 🇩🇪 470 94 3ms 23 Sep 2025 718th luca1339 469 198 302ms 4 Nov 2024 719th ejini6969 468 102 35ms 14 Jun 2025 720th zyc-2024 🇨🇳 468 170 10ms 5 Oct 2024 721st ComputerKWasTaken 🇺🇸 466 171 11ms 14 Oct 2024 722nd snoozingnewt 🇺🇸 465 200 219ms 6 days ago 723rd snoozingnewt 🇺🇸 460 96 3ms 6 days ago 724th Yewzir 🇧🇪 460 171 15ms 26 Dec 2024 725th navier-1 460 173 10ms 22 Sep 2025 726th Jacob385 460 202 298ms 2 Oct 2024 727th madex 🇩🇪 459 104 36ms 2 Oct 2024 728th snoozingnewt 🇺🇸 454 149 4ms 6 days ago 729th snoozingnewt 🇺🇸 453 124 213ms 6 days ago 730th clayboll99 452 176 14ms 10 Jul 2025 731st dokutan 451 63 2ms 26 Nov 2024 732nd snoozingnewt 🇺🇸 450 176 2ms 6 days ago 733rd Upload-and-View 🇺🇦 450 177 19ms 9 Aug 2025 734th varhammer 🇷🇺 450 223 12ms 23 Feb 2025 735th IISResetMe 449 104 494ms 27 Mar 2025 736th OSYCh314 🇦🇺 447 178 10ms 2 Nov 2024 737th dokutan 445 109 10ms 19 Oct 2024 738th grey0ut 444 105 368ms 11 Jan 2025 739th calum12345 442 180 11ms 26 Mar 2025 740th MyXoToD 🇩🇪 441 146 10ms 26 May 2025 741st CheeseCake628 🇳🇴 438 151 453ms 21 days ago 742nd zt14427 438 182 11ms 27 Dec 2024 743rd IoLimmer 435 183 16ms 10 Oct 2024 744th KatieLG 🇬🇧 433 183 2ms 2 Oct 2025 745th aksyristos 433 184 17ms 15 Nov 2024 746th KatieLG 🇬🇧 431 108 7ms 13 Oct 2024 747th snoozingnewt 🇺🇸 430 111 36ms 6 days ago 748th estomagordo 🇳🇱 428 186 10ms 15 Jul 2025 749th snoozingnewt 🇺🇸 426 268 28ms 6 days ago 750th dokutan 425 132 307ms 3 Oct 2024 First Prev 676–750 of 812 Next Last