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 🇬🇧 509 140 380ms 1 Oct 2024 677th KatieLG 🇬🇧 509 146 8ms 2 Oct 2024 678th dokutan 507 126 134ms 22 Jun 2025 679th Chinay-Domitrix 🇺🇸 507 131 3,429ms 30 Mar 2025 680th msbranicky 507 138 4ms 3 Oct 2024 681st lhulinsky 507 157 13ms 21 Oct 2024 682nd yoshykai 507 183 347ms 12 Apr 2025 683rd dokutan 506 116 1,150ms 30 Aug 2025 684th ThatAlo 504 158 12ms 9 Dec 2024 685th snoozingnewt 🇺🇸 501 142 409ms 46 hours ago 686th webmiche 501 159 10ms 32 hours ago 687th MeWhenI 🇻🇦 499 149 45ms 4 Oct 2024 688th janAkali 🇷🇺 499 167 335ms 8 Oct 2024 689th jlangvand 498 141 1ms 15 Oct 2024 689th HumanoidCPU 498 141 2ms 7 Mar 2025 691st CheeseCake628 🇳🇴 498 160 98ms 5 Nov 2024 692nd Mabeloid 🇳🇴 497 133 549ms 2 Oct 2024 693rd pres-abhisheksinha 495 161 11ms 8 Oct 2024 694th ibixina 492 162 11ms 13 Oct 2024 694th TheAtrossian 492 162 11ms 5 Jan 2025 696th TheRealOhead 🇺🇸 491 131 10ms 1 Oct 2024 697th HumanoidCPU 491 145 427ms 5 Oct 2024 698th snoozingnewt 🇺🇸 488 150 135ms 46 hours ago 699th snoozingnewt 🇺🇸 486 117 1,024ms 46 hours ago 700th JunkIce 486 136 560ms 3 Dec 2024 701st h-hh-hhh 🇺🇦 485 177 69ms 2 Nov 2024 702nd snoozingnewt 🇺🇸 484 168 114ms 46 hours ago 703rd Vaekor 483 165 12ms 15 Dec 2024 704th snoozingnewt 🇺🇸 483 249 27ms 46 hours ago 705th snoozingnewt 🇺🇸 482 173 353ms 46 hours ago 706th alphafalfa 480 92 2ms 8 Nov 2024 707th h-hh-hhh 🇺🇦 477 147 2ms 2 Nov 2024 708th mitzal 477 180 65ms 9 Feb 2025 709th ravnskjaer 🇩🇰 476 195 414ms 20 Dec 2024 709th snoozingnewt 🇺🇸 476 195 432ms 46 hours ago 711th MiffOttah 475 150 402ms 6 Oct 2024 712th JesseNoEyes 🇺🇸 471 169 13ms 1 Oct 2024 713th Maximizer02 471 201 11ms 1 Oct 2024 714th iczelia 🇩🇪 470 94 3ms 23 Sep 2025 715th luca1339 469 198 516ms 4 Nov 2024 716th ejini6969 468 102 35ms 14 Jun 2025 717th zyc-2024 🇨🇳 468 170 10ms 5 Oct 2024 718th ComputerKWasTaken 🇺🇸 466 171 11ms 14 Oct 2024 719th snoozingnewt 🇺🇸 465 200 219ms 46 hours ago 720th snoozingnewt 🇺🇸 460 96 3ms 46 hours ago 721st Yewzir 🇧🇪 460 171 15ms 26 Dec 2024 722nd navier-1 460 173 10ms 22 Sep 2025 723rd Jacob385 460 202 474ms 2 Oct 2024 724th madex 🇩🇪 459 104 36ms 2 Oct 2024 725th snoozingnewt 🇺🇸 454 149 4ms 46 hours ago 726th snoozingnewt 🇺🇸 453 124 213ms 46 hours ago 727th clayboll99 452 176 14ms 10 Jul 2025 728th dokutan 451 63 2ms 26 Nov 2024 729th snoozingnewt 🇺🇸 450 176 2ms 46 hours ago 730th Upload-and-View 🇺🇦 450 177 19ms 9 Aug 2025 731st varhammer 🇷🇺 450 223 12ms 23 Feb 2025 732nd IISResetMe 449 104 494ms 27 Mar 2025 733rd OSYCh314 🇦🇺 447 178 10ms 2 Nov 2024 734th dokutan 445 109 10ms 19 Oct 2024 735th grey0ut 444 105 368ms 11 Jan 2025 736th calum12345 442 180 11ms 26 Mar 2025 737th MyXoToD 🇩🇪 441 146 10ms 26 May 2025 738th CheeseCake628 🇳🇴 438 151 453ms 17 days ago 739th zt14427 437 182 11ms 27 Dec 2024 740th IoLimmer 435 183 16ms 10 Oct 2024 741st KatieLG 🇬🇧 433 183 2ms 2 Oct 2025 742nd aksyristos 433 184 17ms 15 Nov 2024 743rd KatieLG 🇬🇧 431 108 7ms 13 Oct 2024 744th snoozingnewt 🇺🇸 430 111 36ms 46 hours ago 745th estomagordo 🇳🇱 428 186 10ms 15 Jul 2025 746th snoozingnewt 🇺🇸 426 268 28ms 46 hours ago 747th dokutan 425 132 307ms 3 Oct 2024 748th MeWhenI 🇻🇦 421 143 7ms 2 Oct 2024 749th Arkadios200 415 196 120ms 14 days ago 750th dieggsy 406 247 21ms 10 Oct 2024 First Prev 676–750 of 809 Next Last