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 dokutan 512 143 128ms 19 Oct 2024 677th nephila-nacrea 🇬🇧 510 77 4ms 2 Oct 2024 678th travisdoesmath 510 156 10ms 7 Sep 2025 678th Shotokhan 510 156 11ms 21 Sep 2025 680th KatieLG 🇬🇧 509 140 380ms 1 Oct 2024 681st KatieLG 🇬🇧 509 146 9ms 2 Oct 2024 682nd dokutan 507 126 134ms 22 Jun 2025 683rd Chinay-Domitrix 🇺🇸 507 131 3,429ms 30 Mar 2025 684th msbranicky 507 138 4ms 3 Oct 2024 685th lhulinsky 507 157 13ms 21 Oct 2024 686th yoshykai 507 183 309ms 12 Apr 2025 687th dokutan 506 116 726ms 30 Aug 2025 688th ThatAlo 504 158 12ms 9 Dec 2024 689th snoozingnewt 🇺🇸 501 142 396ms 8 days ago 690th webmiche 501 159 10ms 7 days ago 691st MeWhenI 🇻🇦 499 149 43ms 4 Oct 2024 692nd janAkali 🇷🇺 499 167 335ms 8 Oct 2024 693rd jlangvand 498 141 1ms 15 Oct 2024 693rd HumanoidCPU 498 141 2ms 7 Mar 2025 695th CheeseCake628 🇳🇴 498 160 98ms 5 Nov 2024 696th Mabeloid 🇳🇴 497 133 549ms 2 Oct 2024 697th pres-abhisheksinha 495 161 11ms 8 Oct 2024 698th ibixina 492 162 11ms 13 Oct 2024 698th TheAtrossian 492 162 11ms 5 Jan 2025 700th TheRealOhead 🇺🇸 491 131 13ms 1 Oct 2024 701st HumanoidCPU 491 145 427ms 5 Oct 2024 702nd snoozingnewt 🇺🇸 488 150 135ms 8 days ago 703rd snoozingnewt 🇺🇸 486 117 1,024ms 8 days ago 704th JunkIce 486 136 560ms 3 Dec 2024 705th h-hh-hhh 🇺🇦 485 177 60ms 2 Nov 2024 706th snoozingnewt 🇺🇸 484 168 105ms 8 days ago 707th Vaekor 483 165 12ms 15 Dec 2024 708th snoozingnewt 🇺🇸 483 249 27ms 8 days ago 709th snoozingnewt 🇺🇸 482 173 353ms 8 days ago 710th alphafalfa 480 92 2ms 8 Nov 2024 711th h-hh-hhh 🇺🇦 477 147 2ms 2 Nov 2024 712th mitzal 477 180 58ms 9 Feb 2025 713th ravnskjaer 🇩🇰 476 195 306ms 20 Dec 2024 713th snoozingnewt 🇺🇸 476 195 370ms 8 days ago 715th MiffOttah 475 150 402ms 6 Oct 2024 716th JesseNoEyes 🇺🇸 471 169 13ms 1 Oct 2024 717th Maximizer02 471 201 11ms 1 Oct 2024 718th iczelia 🇩🇪 470 94 3ms 23 Sep 2025 719th luca1339 469 198 302ms 4 Nov 2024 720th ejini6969 468 102 35ms 14 Jun 2025 721st zyc-2024 🇨🇳 468 170 10ms 5 Oct 2024 722nd ComputerKWasTaken 🇺🇸 466 171 11ms 14 Oct 2024 723rd snoozingnewt 🇺🇸 465 200 219ms 8 days ago 724th snoozingnewt 🇺🇸 460 96 3ms 8 days ago 725th Yewzir 🇧🇪 460 171 15ms 26 Dec 2024 726th navier-1 460 173 10ms 22 Sep 2025 727th Jacob385 460 202 298ms 2 Oct 2024 728th madex 🇩🇪 459 104 36ms 2 Oct 2024 729th snoozingnewt 🇺🇸 454 149 4ms 8 days ago 730th snoozingnewt 🇺🇸 453 124 213ms 8 days ago 731st clayboll99 452 176 14ms 10 Jul 2025 732nd dokutan 451 63 2ms 26 Nov 2024 733rd snoozingnewt 🇺🇸 450 176 2ms 8 days ago 734th Upload-and-View 🇺🇦 450 177 19ms 9 Aug 2025 735th varhammer 🇷🇺 450 223 12ms 23 Feb 2025 736th IISResetMe 449 104 494ms 27 Mar 2025 737th OSYCh314 🇦🇺 447 178 10ms 2 Nov 2024 738th dokutan 445 109 10ms 19 Oct 2024 739th grey0ut 444 105 368ms 11 Jan 2025 740th calum12345 442 180 11ms 26 Mar 2025 741st MyXoToD 🇩🇪 441 146 9ms 26 May 2025 742nd CheeseCake628 🇳🇴 438 151 453ms 23 days ago 743rd zt14427 438 182 11ms 27 Dec 2024 744th IoLimmer 435 183 16ms 10 Oct 2024 745th KatieLG 🇬🇧 433 183 2ms 2 Oct 2025 746th aksyristos 433 184 17ms 15 Nov 2024 747th KatieLG 🇬🇧 431 108 7ms 13 Oct 2024 748th snoozingnewt 🇺🇸 430 111 36ms 8 days ago 749th estomagordo 🇳🇱 428 186 10ms 15 Jul 2025 750th snoozingnewt 🇺🇸 426 268 28ms 8 days ago First Prev 676–750 of 813 Next Last